components: Cleanup class/struct fwd declarations

components/sync/js/js_test_util.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 COMPONENTS_SYNC_JS_JS_TEST_UTIL_H_
 #define COMPONENTS_SYNC_JS_JS_TEST_UTIL_H_
 
 #include <ostream>
 #include <string>
 
 #include "base/memory/weak_ptr.h"
 #include "components/sync/base/weak_handle.h"
 #include "components/sync/js/js_backend.h"
 #include "components/sync/js/js_controller.h"
 #include "components/sync/js/js_event_handler.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace base {
 class DictionaryValue;
-class ListValue;
 }
 
 namespace syncer {
 
 class JsEventDetails;
 
 // Defined for googletest.  Equivalent to "*os << args.ToString()".
 void PrintTo(const JsEventDetails& details, ::std::ostream* os);
 
 // A gmock matcher for JsEventDetails.  Use like:
@@ skipping 37 matching lines @@
 
   WeakHandle<JsEventHandler> AsWeakHandle();
 
   MOCK_METHOD2(HandleJsEvent,
                void(const ::std::string&, const JsEventDetails&));
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_JS_JS_TEST_UTIL_H_