Include sync.pb.h in sync_data.h.

chrome/browser/extensions/extension_service.h

 // Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <list>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/extensions/blacklist.h"
-#include "chrome/browser/extensions/extension_sync_service.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/devtools_agent_host.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/extension_function_histogram_value.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/external_provider_interface.h"
 #include "extensions/browser/management_policy.h"
 #include "extensions/browser/pending_extension_manager.h"
 #include "extensions/browser/process_manager.h"
@@ skipping 24 matching lines @@
 class ExtensionSystem;
 class ExtensionUpdater;
 class PendingExtensionManager;
 class RendererStartupHelper;
 class UpdateObserver;
 }  // namespace extensions
 
 using extensions::ExtensionIdSet;
 
 namespace syncer {
+class ExtensionSyncService;
 class SyncErrorFactory;
 }
 
 // This is an interface class to encapsulate the dependencies that
 // various classes have on ExtensionService. This allows easy mocking.
 class ExtensionServiceInterface
     : public base::SupportsWeakPtr<ExtensionServiceInterface> {
  public:
   virtual ~ExtensionServiceInterface() {}
 
@@ skipping 765 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistedExtensionDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistDontEnableManuallyDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistUnknownDontChange);
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_