Use FakeServer-based invalidations for Sync tests

sync/test/fake_server/fake_server_http_post_provider.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SYNC_TEST_FAKE_SERVER_FAKE_SERVER_HTTP_POST_PROVIDER_H_
 #define SYNC_TEST_FAKE_SERVER_FAKE_SERVER_HTTP_POST_PROVIDER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
+#include "base/synchronization/waitable_event.h"
 #include "sync/internal_api/public/http_post_provider_factory.h"
 #include "sync/internal_api/public/http_post_provider_interface.h"
 
 namespace fake_server {
 
 class FakeServer;
 
 class FakeServerHttpPostProvider
     : public syncer::HttpPostProviderInterface,
       public base::RefCountedThreadSafe<FakeServerHttpPostProvider> {
@@ skipping 11 matching lines @@
   virtual int GetResponseContentLength() const OVERRIDE;
   virtual const char* GetResponseContent() const OVERRIDE;
   virtual const std::string GetResponseHeaderValue(
       const std::string& name) const OVERRIDE;
 
  protected:
   friend class base::RefCountedThreadSafe<FakeServerHttpPostProvider>;
   virtual ~FakeServerHttpPostProvider();
 
  private:
+  void OnPostComplete();
+
   FakeServer* const fake_server_;
   std::string response_;
   std::string request_url_;
   int request_port_;
   std::string request_content_;
   std::string request_content_type_;
   std::string extra_request_headers_;
+  base::WaitableEvent post_complete_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeServerHttpPostProvider);
 };
 
 class FakeServerHttpPostProviderFactory
     : public syncer::HttpPostProviderFactory {
  public:
   explicit FakeServerHttpPostProviderFactory(FakeServer* fake_server);
   virtual ~FakeServerHttpPostProviderFactory();
 
   // HttpPostProviderFactory:
   virtual void Init(const std::string& user_agent) OVERRIDE;
   virtual syncer::HttpPostProviderInterface* Create() OVERRIDE;
   virtual void Destroy(syncer::HttpPostProviderInterface* http) OVERRIDE;
 
  private:
   FakeServer* const fake_server_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeServerHttpPostProviderFactory);
 };
 
 }  //  namespace fake_server
 
 #endif  // SYNC_TEST_FAKE_SERVER_FAKE_SERVER_HTTP_POST_PROVIDER_H_