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plugin_impl_win.cc

// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/default_plugin/plugin_impl_win.h"

#include <shellapi.h>

#include "base/file_util.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "chrome/default_plugin/plugin_main.h"
#include "googleurl/src/gurl.h"
#include "grit/webkit_strings.h"
#include "unicode/locid.h"
#include "webkit/glue/webkit_glue.h"
#include "webkit/glue/plugins/default_plugin_shared.h"

static const int TOOLTIP_MAX_WIDTH = 500;

PluginInstallerImpl::PluginInstallerImpl(int16 mode)
    : instance_(NULL),
      mode_(mode),
      plugin_install_stream_(NULL),
      plugin_installer_state_(PluginInstallerStateUndefined),
      install_dialog_(NULL),
      enable_click_(false),
      icon_(NULL),
      bold_font_(NULL),
      regular_font_(NULL),
      underline_font_(NULL),
      tooltip_(NULL),
      installation_job_monitor_thread_(
          new PluginInstallationJobMonitorThread()),
      plugin_database_handler_(*this),
      plugin_download_url_for_display_(false) {
}

PluginInstallerImpl::~PluginInstallerImpl() {
  installation_job_monitor_thread_->Stop();

  if (bold_font_)
    DeleteObject(bold_font_);

  if (underline_font_)
    DeleteObject(underline_font_);

  if (tooltip_)
    DestroyWindow(tooltip_);
}

bool PluginInstallerImpl::Initialize(HINSTANCE module_handle, NPP instance,
                                     NPMIMEType mime_type, int16 argc,
                                     char* argn[], char* argv[]) {
  DLOG(INFO) << __FUNCTION__ << " MIME Type : " << mime_type;
  DCHECK(instance != NULL);
  DCHECK(module_handle != NULL);

  if (mime_type == NULL || strlen(mime_type) == 0) {
    DLOG(WARNING) << __FUNCTION__ << " Invalid parameters passed in";
    NOTREACHED();
    return false;
  }

  instance_ = instance;
  mime_type_ = mime_type;

  if (!webkit_glue::GetPluginFinderURL(&plugin_finder_url_)) {
    NOTREACHED();
    DLOG(WARNING) << __FUNCTION__ << " Failed to get the plugin finder URL";
    return false;
  }

  if (!installation_job_monitor_thread_->Initialize()) {
    DLOG(ERROR) << "Failed to initialize plugin install job";
    NOTREACHED();
    return false;
  }

  InitializeResources(module_handle);

  DisplayStatus(IDS_DEFAULT_PLUGIN_GET_PLUGIN_MSG_NO_PLUGIN_NAME);
  plugin_database_handler_.DownloadPluginsFileIfNeeded(plugin_finder_url_);

  return true;
}

void PluginInstallerImpl::Shutdown() {
  if (install_dialog_) {
    install_dialog_->RemoveInstaller(this);
    install_dialog_ = NULL;
  }

  if (IsWindow(hwnd())) {
    DestroyWindow(hwnd());
  }
}

void PluginInstallerImpl::NewStream(NPStream* stream) {
  plugin_install_stream_ = stream;
}

void PluginInstallerImpl::DestroyStream(NPStream* stream, NPError reason) {
  if (stream == plugin_install_stream_)
    plugin_install_stream_ = NULL;
}

bool PluginInstallerImpl::WriteReady(NPStream* stream) {
  bool ready_to_accept_data = false;

  if (plugin_installer_state() != PluginListDownloadInitiated) {
    DCHECK(default_plugin::g_browser);
    DCHECK(default_plugin::g_browser->destroystream);
    // We don't want any data, kill the stream.
    default_plugin::g_browser->destroystream(instance_, stream, NPRES_DONE);
  }
  if (0 == lstrcmpiA(stream->url, plugin_finder_url_.c_str())) {
    ready_to_accept_data = true;
  }
  return ready_to_accept_data;
}

int32 PluginInstallerImpl::Write(NPStream* stream, int32 offset,
                                 int32 buffer_length, void* buffer) {
  if (plugin_installer_state() != PluginListDownloadInitiated) {
    DCHECK(default_plugin::g_browser);
    DCHECK(default_plugin::g_browser->destroystream);
    // We don't want any data, kill the stream.
    default_plugin::g_browser->destroystream(instance_, stream, NPRES_DONE);
    return 0;
  }

  return plugin_database_handler_.Write(stream, offset, buffer_length, buffer);
}

void PluginInstallerImpl::ClearDisplay() {
  enable_click_ = false;
  command_.clear();
  optional_additional_message_.clear();
  get_plugin_link_message_.clear();
}

void PluginInstallerImpl::RefreshDisplay() {
  if (!IsWindow(hwnd()))
    return;
  UpdateToolTip();

  InvalidateRect(hwnd(), NULL, TRUE);
  UpdateWindow(hwnd());
}

bool PluginInstallerImpl::CreateToolTip() {
  DWORD ex_styles = IsRTLLayout() ? WS_EX_LAYOUTRTL : 0;
  tooltip_ = CreateWindowEx(ex_styles, TOOLTIPS_CLASS, NULL,
                            WS_POPUP | TTS_ALWAYSTIP,
                            CW_USEDEFAULT, CW_USEDEFAULT,
                            CW_USEDEFAULT, CW_USEDEFAULT,
                            hwnd(), NULL, NULL, NULL);
 if (!tooltip_)
   return false;

  // Associate the ToolTip with the tool.
  TOOLINFO tool_info = {0};
  tool_info.cbSize = sizeof(tool_info);
  tool_info.hwnd = hwnd();
  tool_info.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
  tool_info.uId = reinterpret_cast<UINT_PTR>(hwnd());
  tool_info.lpszText = NULL;
  SendMessage(tooltip_, TTM_ADDTOOL, 0, reinterpret_cast<LPARAM>(&tool_info));
  SendMessage(tooltip_, TTM_SETMAXTIPWIDTH, 0, TOOLTIP_MAX_WIDTH);
  return true;
}

void PluginInstallerImpl::UpdateToolTip() {
  if (tooltip_ == NULL)
    return;
  std::wstring tip = command_;
  if (!optional_additional_message_.empty())
    tip += std::wstring(L"\n\r") + optional_additional_message_;

  TOOLINFO tool_info = {0};
  tool_info.cbSize = sizeof(tool_info);
  tool_info.hwnd = hwnd();
  tool_info.uFlags = TTF_IDISHWND;
  tool_info.uId = reinterpret_cast<UINT_PTR>(hwnd());
  tool_info.lpszText = const_cast<LPWSTR>(tip.c_str());
  SendMessage(tooltip_, TTM_UPDATETIPTEXT, 0, (LPARAM)&tool_info);
}

void PluginInstallerImpl::DisplayAvailablePluginStatus() {
  ClearDisplay();
  enable_click_ = true;
  command_ = ReplaceStringForPossibleEmptyReplacement(
      IDS_DEFAULT_PLUGIN_GET_PLUGIN_MSG,
      IDS_DEFAULT_PLUGIN_GET_PLUGIN_MSG_NO_PLUGIN_NAME,
      plugin_name_);
  optional_additional_message_ =
      webkit_glue::GetLocalizedString(IDS_DEFAULT_PLUGIN_GET_PLUGIN_MSG_2);
  get_plugin_link_message_ = webkit_glue::GetLocalizedString(
      IDS_DEFAULT_PLUGIN_GET_THE_PLUGIN_BTN_MSG);
  RefreshDisplay();
}

void PluginInstallerImpl::DisplayStatus(int message_resource_id) {
  ClearDisplay();
  command_ =
      webkit_glue::GetLocalizedString(message_resource_id);
  RefreshDisplay();
}

void PluginInstallerImpl::DisplayPluginDownloadFailedStatus() {
  ClearDisplay();
  command_ = webkit_glue::GetLocalizedString(
      IDS_DEFAULT_PLUGIN_DOWNLOAD_FAILED_MSG);
  command_ = ReplaceStringPlaceholders(
      command_,
      ASCIIToWide(plugin_download_url_),
      NULL);
  RefreshDisplay();
}

void PluginInstallerImpl::URLNotify(const char* url, NPReason reason) {
  DCHECK(plugin_installer_state_ == PluginListDownloadInitiated);

  if (plugin_installer_state_ == PluginListDownloadInitiated) {
    bool plugin_available = false;
    if (reason == NPRES_DONE) {
      DLOG(INFO) << "Received Done notification for plugin list download";
      plugin_database_handler_.ParsePluginList();
      if (plugin_database_handler_.GetPluginDetailsForMimeType(
              mime_type_.c_str(), desired_language_.c_str(),
              &plugin_download_url_, &plugin_name_,
              &plugin_download_url_for_display_)) {
        plugin_available = true;
        install_dialog_ = PluginInstallDialog::AddInstaller(this, plugin_name_);
        set_plugin_installer_state(PluginListDownloaded);
      } else {
        set_plugin_installer_state(PluginListDownloadedPluginNotFound);
      }

      plugin_database_handler_.Close(false);
    } else {
      DLOG(WARNING) << "Failed to download plugin list";
      set_plugin_installer_state(PluginListDownloadFailed);

      plugin_database_handler_.Close(true);
    }

    if (plugin_available) {
      DLOG(INFO) << "Plugin available for mime type " << mime_type_;
      DisplayAvailablePluginStatus();
      NotifyPluginStatus(default_plugin::MISSING_PLUGIN_AVAILABLE);
    } else {
      DLOG(WARNING) << "No plugin available for mime type " << mime_type_;
      DisplayStatus(IDS_DEFAULT_PLUGIN_NO_PLUGIN_AVAILABLE_MSG);
    }
  }
}

int16 PluginInstallerImpl::NPP_HandleEvent(void* event) {
  NPEvent* npp_event = static_cast<NPEvent*>(event);
  if (npp_event->event == default_plugin::kInstallMissingPluginMessage) {
    // We could get this message because InfoBar may not be in sync with our
    // internal processing. So we need to check the status.
    if (plugin_installer_state() == PluginListDownloaded) {
      ShowInstallDialog();
    }
  }
  return 0;
}

std::wstring PluginInstallerImpl::ReplaceStringForPossibleEmptyReplacement(
    int message_id_with_placeholders,
    int messsage_id_without_placeholders,
    const std::wstring& replacement_string) {
  // If the replacement_string is not empty, load the string identified by
  // the resource id message_id_with_placeholders, and replace the
  // placeholder with the replacement_string. Otherwise return the string
  // identified by resource id messsage_id_without_placeholders.
  if (replacement_string.empty()) {
    return webkit_glue::GetLocalizedString(messsage_id_without_placeholders);
  } else {
    std::wstring string_with_placeholders =
        webkit_glue::GetLocalizedString(message_id_with_placeholders);
    return ReplaceStringPlaceholders(string_with_placeholders,
                                     replacement_string, NULL);
  }
}

bool PluginInstallerImpl::NPP_SetWindow(NPWindow* window_info) {
  HWND parent_window = reinterpret_cast<HWND>(window_info->window);
  if (!IsWindow(parent_window)) {
    // No window created yet. Ignore this call.
    if (!IsWindow(hwnd()))
      return true;
    // Parent window has been destroyed.
    Shutdown();
    return true;
  }

  RECT parent_rect = {0};

  if (IsWindow(hwnd())) {
    GetClientRect(parent_window, &parent_rect);
    SetWindowPos(hwnd(), NULL, parent_rect.left, parent_rect.top,
                 parent_rect.right - parent_rect.left,
                 parent_rect.bottom - parent_rect.top, SWP_SHOWWINDOW);
    return true;
  }
  // First time in -- no window created by plugin yet.
  GetClientRect(parent_window, &parent_rect);
  set_window_style(WS_CHILD | WS_BORDER);
  Init(parent_window, gfx::Rect(parent_rect));
  DCHECK(IsWindow(hwnd()));
  installation_job_monitor_thread_->set_plugin_window(hwnd());

  CreateToolTip();
  UpdateToolTip();

  UpdateWindow(hwnd());
  ShowWindow(hwnd(), SW_SHOW);

  return true;
}

void PluginInstallerImpl::DownloadPlugin() {
  set_plugin_installer_state(PluginDownloadInitiated);

  DLOG(INFO) << "Initiating download for plugin URL "
             << plugin_download_url_.c_str();

  DisplayStatus(IDS_DEFAULT_PLUGIN_DOWNLOADING_PLUGIN_MSG);

  if (!plugin_download_url_for_display_) {
    webkit_glue::DownloadUrl(plugin_download_url_, hwnd());
  } else {
    default_plugin::g_browser->geturl(instance(),
                                      plugin_download_url_.c_str(),
                                      "_blank");
    set_plugin_installer_state(PluginInstallerLaunchSuccess);
    DisplayStatus(IDS_DEFAULT_PLUGIN_REFRESH_PLUGIN_MSG);
    enable_click_ = true;
    RefreshDisplay();
  }
}

void PluginInstallerImpl::DownloadCancelled() {
  DisplayAvailablePluginStatus();
}

LRESULT PluginInstallerImpl::OnEraseBackGround(UINT message, WPARAM wparam,
                                               LPARAM lparam, BOOL& handled) {
  HDC paint_device_context = reinterpret_cast<HDC>(wparam);
  RECT erase_rect = {0};
  GetClipBox(paint_device_context, &erase_rect);
  HBRUSH brush = ::CreateSolidBrush(RGB(252, 235, 162));
  DCHECK(brush);
  FillRect(paint_device_context, &erase_rect, brush);
  DeleteObject(brush);
  return 1;
}

// Use ICU in order to determine whether the locale is right-to-left.
//
// TODO(idana) bug# 1246452: there is already code in
// app/l10n_util.h/cc that uses ICU to determine the locale direction. We don't
// currently use this code since code in WebKit should not depend on code in
// Chrome. We can fix this by pulling (at least part of) the l10n_util
// functionality up into the Base module.
bool PluginInstallerImpl::IsRTLLayout() {
  const icu::Locale& locale = icu::Locale::getDefault();
  const char* lang = locale.getLanguage();

  // Check only for Arabic and Hebrew languages for now.
  if (strcmp(lang, "ar") == 0 || strcmp(lang, "he") == 0) {
    return true;
  }
  return false;
}

LRESULT PluginInstallerImpl::OnPaint(UINT message, WPARAM wparam, LPARAM lparam,
                                     BOOL& handled) {
  PAINTSTRUCT paint_struct = {0};
  BeginPaint(hwnd(), &paint_struct);

  int save_dc_context = SaveDC(paint_struct.hdc);
  // The drawing order is as below:-
  // 1. The Get plugin link at the top left corner.
  // 2. The plugin icon.
  // 3. The text describing user actions to the right of the icon.
  SIZE get_plugin_link_extents = {0};
  HFONT old_font =
      reinterpret_cast<HFONT>(SelectObject(paint_struct.hdc, regular_font_));

  GetTextExtentPoint32(paint_struct.hdc, get_plugin_link_message_.c_str(),
                       static_cast<int>(get_plugin_link_message_.length()),
                       &get_plugin_link_extents);

  POINT device_point = {0};
  device_point.x = get_plugin_link_extents.cx;
  device_point.y = get_plugin_link_extents.cy;
  LPtoDP(paint_struct.hdc, &device_point, 1);

  RECT text_rect = {0};
  text_rect.left   = 5;
  text_rect.right  = text_rect.left + device_point.x;
  text_rect.top    = 5;
  text_rect.bottom = text_rect.top + device_point.y;

  RECT client_rect = {0};
  GetClientRect(hwnd(), &client_rect);

  int icon_width = GetSystemMetrics(SM_CXICON);
  int icon_height = GetSystemMetrics(SM_CYICON);

  int x = (client_rect.right / 2) - icon_width / 2;
  int y = (client_rect.bottom / 2) - icon_height / 2;

  DCHECK(icon_);
  DrawIcon(paint_struct.hdc, x, y, icon_);

  int old_mode = SetBkMode(paint_struct.hdc, TRANSPARENT);
  COLORREF old_color = SetTextColor(paint_struct.hdc, RGB(0, 0, 255));

  // If the UI layout is right-to-left, we need to mirror the position of the
  // link text and also make sure that the text is aligned to the right.
  DWORD draw_text_flags = DT_VCENTER;
  if (IsRTLLayout()) {
    draw_text_flags |= DT_RTLREADING | DT_RIGHT;
    int text_width = text_rect.right - text_rect.left;
    int client_width = client_rect.right - client_rect.left;
    text_rect.left = client_width - text_rect.left - text_width;
    text_rect.right = text_rect.left + text_width;
  } else {
    draw_text_flags |= DT_LEFT;
  }

  DrawText(paint_struct.hdc, get_plugin_link_message_.c_str(),
           static_cast<int>(get_plugin_link_message_.length()),
           &text_rect, draw_text_flags);

  SIZE command_extents = {0};
  GetTextExtentPoint32(paint_struct.hdc, command_.c_str(),
                       static_cast<int>(command_.length()), &command_extents);

  int y_origin = y + (icon_height) + 10;
  int x_origin = x - command_extents.cx / 2 + icon_width / 2;

  // If the window is too small then no point in attempting to display plugin
  // information. In any case this info is displayed when the user hovers
  // over the plugin window.
  int window_width = client_rect.right - client_rect.left;
  int window_height = client_rect.bottom - client_rect.top;

  if ((x_origin + command_extents.cx <= window_width) &&
    (y_origin + command_extents.cy <= window_height)) {
    PaintUserActionInformation(paint_struct.hdc, x_origin, y_origin);
  }

  RestoreDC(paint_struct.hdc, save_dc_context);
  EndPaint(hwnd(), &paint_struct);
  return 0;
}

void PluginInstallerImpl::PaintUserActionInformation(HDC paint_dc,
                                                     int x_origin,
                                                     int y_origin) {
  SelectObject(paint_dc, regular_font_);

  SIZE command_extents = {0};
  GetTextExtentPoint32(paint_dc, command_.c_str(),
                       static_cast<int>(command_.length()), &command_extents);
  POINT device_point = {0};
  device_point.x = command_extents.cx;
  device_point.y = command_extents.cy;
  LPtoDP(paint_dc, &device_point, 1);

  RECT text_rect = {0};
  text_rect.left   = x_origin;
  text_rect.right  = text_rect.left + device_point.x;
  text_rect.top    = y_origin;
  text_rect.bottom = text_rect.top + device_point.y;

  SetTextColor(paint_dc, RGB(0, 0, 0));

  // Make sure we pass the right BiDi flags to DrawText if the UI layout is
  // right-to-left.
  UINT additional_dt_flags = IsRTLLayout() ? DT_RTLREADING : 0;
  DrawText(paint_dc, command_.c_str(),
           static_cast<int>(command_.length()), &text_rect,
           DT_CENTER | DT_VCENTER | additional_dt_flags);

  if (!optional_additional_message_.empty()) {
    SelectObject(paint_dc, regular_font_);

    SIZE optional_text_extents = {0};
    int optional_message_length =
          static_cast<int>(optional_additional_message_.length());
    GetTextExtentPoint32(paint_dc,
                         optional_additional_message_.c_str(),
                         optional_message_length,
                         &optional_text_extents);
    POINT device_point = {0};
    device_point.x = optional_text_extents.cx;
    device_point.y = optional_text_extents.cy;
    LPtoDP(paint_dc, &device_point, 1);

    text_rect.right  = text_rect.left + device_point.x;
    text_rect.top = y_origin + command_extents.cy + 2;
    text_rect.bottom = text_rect.top + device_point.y;

    DrawText(paint_dc, optional_additional_message_.c_str(),
             static_cast<int>(optional_additional_message_.length()),
             &text_rect, DT_CENTER | DT_VCENTER | additional_dt_flags);
  }
}

void PluginInstallerImpl::ShowInstallDialog() {
  enable_click_ = false;
  install_dialog_->ShowInstallDialog(hwnd());
}

LRESULT PluginInstallerImpl::OnLButtonDown(UINT message, WPARAM wparam,
                                           LPARAM lparam, BOOL& handled) {
  if (!enable_click_)
    return 0;
  if (plugin_installer_state() == PluginListDownloaded) {
    ShowInstallDialog();
    NotifyPluginStatus(default_plugin::MISSING_PLUGIN_USER_STARTED_DOWNLOAD);
  } else if (plugin_installer_state_ == PluginInstallerLaunchSuccess) {
    DCHECK(default_plugin::g_browser);
    DCHECK(default_plugin::g_browser->geturl);
    default_plugin::g_browser->geturl(
        instance_,
        "javascript:navigator.plugins.refresh(true)",
        "_self");
    default_plugin::g_browser->geturl(
        instance_,
        "javascript:window.location.reload(true)",
        "_self");
  }

  return 0;
}

LRESULT PluginInstallerImpl::OnSetCursor(UINT message, WPARAM wparam,
                                         LPARAM lparam, BOOL& handled) {
  if (enable_click_) {
    SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_HAND)));
    return 1;
  }
  handled = FALSE;
  return 0;
}

LRESULT PluginInstallerImpl::OnRefreshPlugins(UINT message, WPARAM wparam,
                                              LPARAM lparam, BOOL& handled) {
  DCHECK(default_plugin::g_browser);
  DCHECK(default_plugin::g_browser->geturl);
  default_plugin::g_browser->geturl(
      instance_,
      "javascript:navigator.plugins.refresh(true)",
      "_self");
  default_plugin::g_browser->geturl(
      instance_,
      "javascript:window.location.reload(true)",
      "_self");
  return 0;
}

LRESULT PluginInstallerImpl::OnCopyData(UINT message, WPARAM wparam,
                                        LPARAM lparam, BOOL& handled) {
  COPYDATASTRUCT* download_file_info =
      reinterpret_cast<COPYDATASTRUCT*>(lparam);
  if (!download_file_info || !download_file_info->dwData) {
    DLOG(WARNING) << "Failed to download plugin";
    set_plugin_installer_state(PluginDownloadFailed);
    DisplayPluginDownloadFailedStatus();
  } else {
    DLOG(INFO) << "Successfully downloaded plugin installer";
    set_plugin_installer_state(PluginDownloadCompleted);

    std::wstring file_path =
        reinterpret_cast<const wchar_t*>(download_file_info->lpData);

    FilePath current_directory = FilePath(file_path).DirName();

    SHELLEXECUTEINFO shell_execute_info = {0};
    shell_execute_info.cbSize = sizeof(shell_execute_info);
    shell_execute_info.fMask = SEE_MASK_NOCLOSEPROCESS;
    shell_execute_info.lpFile = file_path.c_str();
    shell_execute_info.lpDirectory = current_directory.value().c_str();
    shell_execute_info.nShow = SW_SHOW;

    if (!ShellExecuteEx(&shell_execute_info)) {
      DLOG(WARNING) << "Failed to launch plugin installer "
                    << file_path.c_str() << " Error "
                    << ::GetLastError();
      set_plugin_installer_state(PluginInstallerLaunchFailure);
      DisplayStatus(IDS_DEFAULT_PLUGIN_INSTALLATION_FAILED_MSG);
      NOTREACHED();
    } else {
      DLOG(INFO) << "Successfully launched plugin installer";
      set_plugin_installer_state(PluginInstallerLaunchSuccess);
      installation_job_monitor_thread_->AssignProcessToJob(
          shell_execute_info.hProcess);
      DisplayStatus(IDS_DEFAULT_PLUGIN_REFRESH_PLUGIN_MSG);
      enable_click_ = true;
      RefreshDisplay();
    }
  }
  return 0;
}

bool PluginInstallerImpl::InitializeResources(HINSTANCE module_handle) {
  DCHECK(icon_ == NULL);
  DCHECK(regular_font_ == NULL);
  DCHECK(bold_font_ == NULL);
  DCHECK(underline_font_ == NULL);

  icon_ = LoadIcon(module_handle, MAKEINTRESOURCE(IDI_DEFAULT_PLUGIN_ICON));
  DCHECK(icon_ != NULL);

  desired_language_ = "en-us";
  regular_font_ = reinterpret_cast<HFONT>(GetStockObject(DEFAULT_GUI_FONT));
  DCHECK(regular_font_ != NULL);

  LOGFONT font_info = {0};
  GetObject(regular_font_, sizeof(LOGFONT), &font_info);
  font_info.lfWeight |= FW_BOLD;
  bold_font_ = CreateFontIndirect(&font_info);
  DCHECK(bold_font_ != NULL);

  font_info.lfUnderline = TRUE;
  underline_font_ = CreateFontIndirect(&font_info);
  DCHECK(underline_font_ != NULL);
  return true;
}

void PluginInstallerImpl::NotifyPluginStatus(int status) {
  default_plugin::g_browser->getvalue(
      instance_,
      static_cast<NPNVariable>(
          default_plugin::kMissingPluginStatusStart + status),
      NULL);
}

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