Browser test for the push messaging feature

chrome/browser/sync/profile_sync_service.h

Index: chrome/browser/sync/profile_sync_service.h
diff --git a/chrome/browser/sync/profile_sync_service.h b/chrome/browser/sync/profile_sync_service.h
index 216ef1c483e0c9627677b173784f642894c14ad1..3aee598633191f237e813879bfcca268a46c9574 100644
--- a/chrome/browser/sync/profile_sync_service.h
+++ b/chrome/browser/sync/profile_sync_service.h
@@ -575,6 +575,11 @@ class ProfileSyncService : public browser_sync::SyncFrontend,
   // ProfileKeyedService implementation.
   virtual void Shutdown() OVERRIDE;
 
+  // Simulate an incoming notification for the given id and payload.
+  void EmitInvalidationForTest(
+      const invalidation::ObjectId& id,
+      const std::string& payload);
+
  protected:
   // Used by test classes that derive from ProfileSyncService.
   virtual browser_sync::SyncBackendHost* GetBackendForTest();