blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/workers/ThreadedMessagingProxyBase.h

 // Copyright 2016 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 ThreadedMessagingProxyBase_h
 #define ThreadedMessagingProxyBase_h
 
 #include "core/CoreExport.h"
 #include "core/inspector/ConsoleTypes.h"
 #include "core/workers/WorkerLoaderProxy.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class ExecutionContext;
 class ParentFrameTaskRunners;
+class SourceLocation;
 class WorkerInspectorProxy;
 class WorkerLoaderProxy;
 class WorkerThread;
 class WorkerThreadStartupData;
 
 class CORE_EXPORT ThreadedMessagingProxyBase
     : private WorkerLoaderProxyProvider {
  public:
   void terminateGlobalScope();
 
@@ skipping 64 matching lines @@
 
   RefPtr<WorkerLoaderProxy> m_loaderProxy;
 
   bool m_mayBeDestroyed;
   bool m_askedToTerminate;
 };
 
 }  // namespace blink
 
 #endif  // ThreadedMessagingProxyBase_h