Prune shared extendion module after extension updating.

chrome/browser/extensions/api/management/management_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/management/management_api.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 929 matching lines @@
 
 void ManagementEventRouter::OnExtensionUnloaded(
     content::BrowserContext* browser_context,
     const Extension* extension,
     UnloadedExtensionInfo::Reason reason) {
   BroadcastEvent(extension, management::OnDisabled::kEventName);
 }
 
 void ManagementEventRouter::OnExtensionInstalled(
     content::BrowserContext* browser_context,
-    const Extension* extension) {
+    const Extension* extension,
+    bool is_update) {
   BroadcastEvent(extension, management::OnInstalled::kEventName);
 }
 
 void ManagementEventRouter::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
     const Extension* extension) {
   BroadcastEvent(extension, management::OnUninstalled::kEventName);
 }
 
 void ManagementEventRouter::BroadcastEvent(const Extension* extension,
@@ skipping 37 matching lines @@
 ManagementAPI::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 void ManagementAPI::OnListenerAdded(const EventListenerInfo& details) {
   management_event_router_.reset(new ManagementEventRouter(browser_context_));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 }  // namespace extensions