Graceful handling of extension process crashes

chrome/browser/extensions/extension_process_manager.h

 // Copyright (c) 2009 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_PROCESS_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_
 
 #include <set>
 
 #include "base/ref_counted.h"
@@ skipping 39 matching lines @@
 
   typedef std::set<ExtensionHost*> ExtensionHostSet;
   typedef ExtensionHostSet::const_iterator const_iterator;
   const_iterator begin() const { return all_hosts_.begin(); }
   const_iterator end() const { return all_hosts_.end(); }
 
   // Called just before |host| is destroyed so it can be de-registered
   // from our lists.
   void OnExtensionHostDestroyed(ExtensionHost* host);
 
+  // Called after an extension render process crashes.
+  void OnExtensionProcessCrashed(ExtensionHost* host);
+
+  // Called after an extension process successfully restarts after crash.
+  void OnExtensionProcessRestored(ExtensionHost* host);
+
  private:
   // Called just after |host| is created so it can be registered in our lists.
   void OnExtensionHostCreated(ExtensionHost* host, bool is_background);
 
   NotificationRegistrar registrar_;
 
   // The set of all ExtensionHosts managed by this process manager.
   ExtensionHostSet all_hosts_;
 
   // The set of running viewless background extensions.
   ExtensionHostSet background_hosts_;
 
   // The BrowsingInstance shared by all extensions in this profile.  This
   // controls process grouping.
   scoped_refptr<BrowsingInstance> browsing_instance_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionProcessManager);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_