blink: Cleanup class forward declarations

third_party/WebKit/Source/platform/graphics/paint/PaintController.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 PaintController_h
 #define PaintController_h
 
 #include "platform/PlatformExport.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/geometry/IntRect.h"
@@ skipping 13 matching lines @@
 #include "wtf/HashSet.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/Vector.h"
 #include <memory>
 #include <utility>
 
 class SkPicture;
 
 namespace blink {
 
-class GraphicsContext;
-
 static const size_t kInitialDisplayItemListCapacityBytes = 512;
 
 template class RasterInvalidationTrackingMap<const PaintChunk>;
 
 // Responsible for processing display items as they are produced, and producing
 // a final paint artifact when complete. This class includes logic for caching,
 // cache invalidation, and merging.
 class PLATFORM_EXPORT PaintController {
   WTF_MAKE_NONCOPYABLE(PaintController);
   USING_FAST_MALLOC(PaintController);
@@ skipping 320 matching lines @@
 
 #if CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
   // A stack recording subsequence clients that are currently painting.
   Vector<const DisplayItemClient*> m_currentSubsequenceClients;
 #endif
 };
 
 }  // namespace blink
 
 #endif  // PaintController_h