Add a hang monitor for Pepper plugins

content/browser/web_contents/web_contents_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 443 matching lines @@
   void OnFindReply(int request_id, int number_of_matches,
                    const gfx::Rect& selection_rect, int active_match_ordinal,
                    bool final_update);
   void OnCrashedPlugin(const FilePath& plugin_path);
   void OnAppCacheAccessed(const GURL& manifest_url, bool blocked_by_policy);
   void OnOpenColorChooser(int color_chooser_id,
                           const SkColor& color);
   void OnEndColorChooser(int color_chooser_id);
   void OnSetSelectedColorInColorChooser(int color_chooser_id,
                                         const SkColor& color);
+  void OnPepperPluginHung(int plugin_child_id,
+                          const FilePath& path,
+                          bool is_hung);
 
   // Changes the IsLoading state and notifies delegate as needed
   // |details| is used to provide details on the load that just finished
   // (but can be null if not applicable). Can be overridden.
   void SetIsLoading(bool is_loading,
                     content::LoadNotificationDetails* details);
 
   // Called by derived classes to indicate that we're no longer waiting for a
   // response. This won't actually update the throbber, but it will get picked
   // up at the next animation step if the throbber is going.
@@ skipping 215 matching lines @@
 
   // Color chooser that was opened by this tab.
   content::ColorChooser* color_chooser_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 typedef class WebContentsImpl TabContents;
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_