[Sync] Make SyncBackendHost::Core use a WeakHandle to its host

chrome/browser/sync/test_profile_sync_service.h

Index: chrome/browser/sync/test_profile_sync_service.h
diff --git a/chrome/browser/sync/test_profile_sync_service.h b/chrome/browser/sync/test_profile_sync_service.h
index 6599efb97462f43da9960995ca93677aac0088d3..9eea551b9d963032540adf755e52c02eff70e9ab 100644
--- a/chrome/browser/sync/test_profile_sync_service.h
+++ b/chrome/browser/sync/test_profile_sync_service.h
@@ -45,9 +45,6 @@ class SyncBackendHostForProfileSyncTest : public SyncBackendHost {
   void SimulateSyncCycleCompletedInitialSyncEnded(
       const tracked_objects::Location&);
 
-  virtual sync_api::HttpPostProviderFactory* MakeHttpBridgeFactory(
-      const scoped_refptr<net::URLRequestContextGetter>& getter) OVERRIDE;
-
   virtual void StartConfiguration(const base::Closure& callback) OVERRIDE;
 
   static void SetDefaultExpectationsForWorkerCreation(ProfileMock* profile);
@@ -55,7 +52,7 @@ class SyncBackendHostForProfileSyncTest : public SyncBackendHost {
   static void SetHistoryServiceExpectations(ProfileMock* profile);
 
  protected:
-  virtual void InitCore(const Core::DoInitializeOptions& options) OVERRIDE;
+  virtual void InitCore(const DoInitializeOptions& options) OVERRIDE;
 
  private:
   bool synchronous_init_;