Update component extension reload backoff logic.

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 <stdint.h>
 
 #include <map>
@@ skipping 198 matching lines @@
   void ShutdownAssociatedBackgroundContents(const base::string16& appid);
 
   // Returns true if this BackgroundContents is in the contents_list_.
   bool IsTracked(BackgroundContents* contents) const;
 
   // Sends out a notification when our association of background contents with
   // apps may have changed (used by BackgroundApplicationListModel to update the
   // set of background apps as new background contents are opened/closed).
   void SendChangeNotification(Profile* profile);
 
+  // Checks whether there has been additional |extension_id| failures. If not,
+  // delete the BackoffEntry corresponding to |extension_id|, if exists.
+  void MaybeClearBackoffEntry(const std::string extension_id,
+                              int expected_failure_count);
+
   // Delay (in ms) before restarting a force-installed extension that crashed.
   static int restart_delay_in_ms_;
 
   // PrefService used to store list of background pages (or NULL if this is
   // running under an incognito profile).
   PrefService* prefs_;
   content::NotificationRegistrar registrar_;
 
   // Information we track about each BackgroundContents.
   struct BackgroundContentsInfo {
@@ skipping 18 matching lines @@
   ExtensionBackoffEntryMap backoff_map_;
 
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundContentsService);
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_