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 5e6fd54cdc2d935ce9201ea2b2bf13a016351fb4..b896cebb516e47cae65c1d4458d7ba010c74f94d 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -517,6 +517,10 @@ 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;