Prune shared extendion module after extension updating.

chrome/browser/extensions/extension_service.cc

 // Copyright (c) 2013 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/extension_service.h"
 
 #include <algorithm>
 #include <iterator>
 #include <set>
 
@@ skipping 1798 matching lines @@
   // Unpacked extensions default to allowing file access, but if that has been
   // overridden, don't reset the value.
   if (Manifest::ShouldAlwaysAllowFileAccess(extension->location()) &&
       !extension_prefs_->HasAllowFileAccessSetting(extension->id())) {
     extension_prefs_->SetAllowFileAccess(extension->id(), true);
   }
 
   AddExtension(extension);
 
   // Notify observers that need to know when an installation is complete.
-  registry_->TriggerOnInstalled(extension);
+  registry_->TriggerOnInstalled(extension, is_update);
 
   // Check extensions that may have been delayed only because this shared module
   // was not available.
   if (SharedModuleInfo::IsSharedModule(extension))
     MaybeFinishDelayedInstallations();
 }
 
 void ExtensionService::PromoteEphemeralApp(
     const extensions::Extension* extension, bool is_from_sync) {
   DCHECK(GetInstalledExtension(extension->id()) &&
@@ skipping 37 matching lines @@
 
   if (registry_->enabled_extensions().Contains(extension->id())) {
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_EXTENSION_LOADED_DEPRECATED,
         content::Source<Profile>(profile_),
         content::Details<const Extension>(extension));
 
     registry_->TriggerOnLoaded(extension);
   }
 
-  registry_->TriggerOnInstalled(extension);
+  registry_->TriggerOnInstalled(extension, true);
 
   if (!is_from_sync && extension_sync_service_)
     extension_sync_service_->SyncExtensionChangeIfNeeded(*extension);
 }
 
 const Extension* ExtensionService::GetPendingExtensionUpdate(
     const std::string& id) const {
   return delayed_installs_.GetByID(id);
 }
 
@@ skipping 458 matching lines @@
 }
 
 void ExtensionService::OnProfileDestructionStarted() {
   ExtensionIdSet ids_to_unload = registry_->enabled_extensions().GetIDs();
   for (ExtensionIdSet::iterator it = ids_to_unload.begin();
        it != ids_to_unload.end();
        ++it) {
     UnloadExtension(*it, UnloadedExtensionInfo::REASON_PROFILE_SHUTDOWN);
   }
 }