Revert 208315 "Make use of InvalidationService"

trunk/src/chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_handler.h

Index: trunk/src/chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_handler.h
===================================================================
--- trunk/src/chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_handler.h	(revision 208346)
+++ trunk/src/chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_handler.h	(working copy)
@@ -15,7 +15,7 @@
 #include "sync/notifier/invalidation_handler.h"
 
 namespace invalidation {
-class InvalidationService;
+class InvalidationFrontend;
 }
 
 namespace extensions {
@@ -32,7 +32,7 @@
   // |extension_ids| is the set of extension IDs for which push messaging is
   // enabled.
   PushMessagingInvalidationHandler(
-      invalidation::InvalidationService* service,
+      invalidation::InvalidationFrontend* service,
       PushMessagingInvalidationHandlerDelegate* delegate);
   virtual ~PushMessagingInvalidationHandler();
 
@@ -56,7 +56,7 @@
   void UpdateRegistrations();
 
   base::ThreadChecker thread_checker_;
-  invalidation::InvalidationService* const service_;
+  invalidation::InvalidationFrontend* const service_;
   std::set<std::string> registered_extensions_;
   syncer::ObjectIdSet suppressed_ids_;
   PushMessagingInvalidationHandlerDelegate* const delegate_;