Cleanup: Remove unneeded forward declarations in chrome/browser/sync.

chrome/browser/sync/test/engine/mock_connection_manager.h

 // Copyright (c) 2011 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.
 //
 // Mock ServerConnectionManager class for use in client unit tests.
 
 #ifndef CHROME_BROWSER_SYNC_TEST_ENGINE_MOCK_CONNECTION_MANAGER_H_
 #define CHROME_BROWSER_SYNC_TEST_ENGINE_MOCK_CONNECTION_MANAGER_H_
 #pragma once
 
 #include <bitset>
 #include <list>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_vector.h"
 #include "chrome/browser/sync/engine/net/server_connection_manager.h"
 #include "chrome/browser/sync/protocol/sync.pb.h"
 #include "chrome/browser/sync/syncable/directory_manager.h"
 #include "chrome/browser/sync/syncable/model_type.h"
 #include "chrome/browser/sync/syncable/model_type_payload_map.h"
 
 namespace syncable {
 class DirectoryManager;
-class ScopedDirLookup;
-}
-namespace browser_sync {
-struct HttpResponse;
 }
 
 class MockConnectionManager : public browser_sync::ServerConnectionManager {
  public:
   class MidCommitObserver {
    public:
     virtual void Observe() = 0;
 
    protected:
     virtual ~MidCommitObserver() {}
@@ skipping 314 matching lines @@
   int num_get_updates_requests_;
 
   std::string next_token_;
 
   sync_pb::ClientToServerMessage last_request_;
 
   DISALLOW_COPY_AND_ASSIGN(MockConnectionManager);
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_ENGINE_MOCK_CONNECTION_MANAGER_H_