Add "inspect background page" to platform app right-click menu.

chrome/browser/extensions/extension_service.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 600 matching lines @@
   // Gets the set of loaded app ids. Component apps are not included.
   extensions::ExtensionIdSet GetAppIds() const;
 
   // Record a histogram using the PermissionMessage enum values for each
   // permission in |e|.
   // NOTE: If this is ever called with high frequency, the implementation may
   // need to be made more efficient.
   static void RecordPermissionMessagesHistogram(
       const extensions::Extension* e, const char* histogram);
 
+  // Open a dev tools window for the background page for the given extension,
+  // starting the background page first if necesary.
+  void InspectBackgroundPage(const extensions::Extension* extension);
+
 #if defined(UNIT_TEST)
   void TrackTerminatedExtensionForTest(const extensions::Extension* extension) {
     TrackTerminatedExtension(extension);
   }
 #endif
 
   ExtensionWarningSet* extension_warnings() {
     return &extension_warnings_;
   }
 
@@ skipping 88 matching lines @@
   // a NaCl module to see those changes reflected in the PluginList.
   void UpdatePluginListWithNaClModules();
 
   NaClModuleInfoList::iterator FindNaClModule(const GURL& url);
 
   // Enqueues a launch task in the lazy background page queue.
   void QueueRestoreAppWindow(const extensions::Extension* extension);
   // Launches the platform app associated with |extension_host|.
   static void LaunchApplication(extensions::ExtensionHost* extension_host);
 
+  // Helper to inspect an ExtensionHost after it has been loaded.
+  void InspectExtensionHost(extensions::ExtensionHost* host);
+
   // The normal profile associated with this ExtensionService.
   Profile* profile_;
 
   // The ExtensionSystem for the profile above.
   extensions::ExtensionSystem* system_;
 
   // Preferences for the owning profile (weak reference).
   extensions::ExtensionPrefs* extension_prefs_;
 
   // Settings for the owning profile.
@@ skipping 147 matching lines @@
 #endif
 
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsAndCheckStorageProtection);
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_