Plumb invalidations from Tango to the extensions code for the Push Messaging API.

chrome/browser/extensions/extension_service.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/extension_service.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 505 matching lines @@
   input_method_event_router_.reset(
       new chromeos::ExtensionInputMethodEventRouter);
 
   ExtensionMediaPlayerEventRouter::GetInstance()->Init(profile_);
   extensions::InputImeEventRouter::GetInstance()->Init();
 #endif
 #endif  // defined(ENABLE_EXTENSIONS)
   event_routers_initialized_ = true;
 }
 
+void ExtensionService::Shutdown() {
+  push_messaging_event_router_->Shutdown();

[Munjal (Google), 2012/08/14 18:56:37]

Can't we clean up the event router in the destructor instead of adding an
explicit method call?

[dcheng, 2012/08/14 21:39:59]

We cannot. We have dependencies such that PSS depends on ExtensionSystem. That
means that PSS is destroyed before ExtensionSystem, so we need to drop our
references to PSS in Shutdown() before it is destroyed.

+}
+
 const Extension* ExtensionService::GetExtensionById(
     const std::string& id, bool include_disabled) const {
   return GetExtensionByIdInternal(id, true, include_disabled, false);
 }
 
 void ExtensionService::Init() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   DCHECK(!ready_);  // Can't redo init.
   DCHECK_EQ(extensions_.size(), 0u);
@@ skipping 2016 matching lines @@
 
 ExtensionService::NaClModuleInfoList::iterator
     ExtensionService::FindNaClModule(const GURL& url) {
   for (NaClModuleInfoList::iterator iter = nacl_module_list_.begin();
        iter != nacl_module_list_.end(); ++iter) {
     if (iter->url == url)
       return iter;
   }
   return nacl_module_list_.end();
 }