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

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 485eb6be7af64b6c48c0f2856f161158fd63c07e..b84026482479e21caa6177c8332fa82cd34b8de8 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -523,6 +523,10 @@ void ExtensionService::InitEventRouters() {
   event_routers_initialized_ = true;
 }
 
+void ExtensionService::Shutdown() {
+  push_messaging_event_router_->Shutdown();
+}
+
 const Extension* ExtensionService::GetExtensionById(
     const std::string& id, bool include_disabled) const {
   int include_mask = INCLUDE_ENABLED;