Fixes a typo: use the default image if the extension doesn't have icon.

chrome/browser/background/background_contents_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_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_
 #define CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 43 matching lines @@
                                   public BrowserContextKeyedService {
  public:
   BackgroundContentsService(Profile* profile, const CommandLine* command_line);
   virtual ~BackgroundContentsService();
 
   // Allows tests to reduce the time between a force-installed app/extension
   // crashing and when we reload it.
   static void SetRestartDelayForForceInstalledAppsAndExtensionsForTesting(
       int restart_delay_in_ms);
 
+  // Get the crash notification's id for the extension.
+  static std::string GetNotificationIdForExtensionForTesting(
+      const std::string& extension_id);
+
+  // Show a popup notification balloon with a crash message for a given app/
+  // extension.
+  static void ShowBalloonForTesting(const extensions::Extension* extension,
+                                    Profile* profile);
+
   // Returns the BackgroundContents associated with the passed application id,
   // or NULL if none.
   BackgroundContents* GetAppBackgroundContents(const base::string16& appid);
 
   // Returns true if there's a registered BackgroundContents for this app. It
   // is possible for this routine to return true when GetAppBackgroundContents()
   // returns false, if the BackgroundContents closed due to the render process
   // crashing.
   bool HasRegisteredBackgroundContents(const base::string16& appid);
 
@@ skipping 131 matching lines @@
   // Key: application id
   // Value: BackgroundContentsInfo for the BC associated with that application
   typedef std::map<base::string16, BackgroundContentsInfo>
       BackgroundContentsMap;
   BackgroundContentsMap contents_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundContentsService);
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_