Remove duplicated headers from core/

Source/core/platform/graphics/ImageBuffer.cpp

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 16 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/platform/graphics/ImageBuffer.h"
 
 #include "core/platform/graphics/BitmapImage.h"
-#include "core/platform/graphics/Canvas2DLayerBridge.h"
 #include "core/platform/graphics/Extensions3D.h"
 #include "core/platform/graphics/GaneshUtils.h"
-#include "core/platform/graphics/GraphicsContext.h"
 #include "core/platform/graphics/GraphicsContext3D.h"
 #include "core/platform/graphics/gpu/DrawingBuffer.h"
 #include "core/platform/graphics/gpu/SharedGraphicsContext3D.h"
 #include "core/platform/graphics/skia/NativeImageSkia.h"
 #include "core/platform/graphics/skia/SkiaUtils.h"
 #include "core/platform/image-encoders/skia/JPEGImageEncoder.h"
 #include "core/platform/image-encoders/skia/PNGImageEncoder.h"
 #include "core/platform/image-encoders/skia/WEBPImageEncoder.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/geometry/IntRect.h"
@@ skipping 510 matching lines @@
     if (!encodeImage(imageData, mimeType, quality, &encodedImage))
         return "data:,";
 
     Vector<char> base64Data;
     base64Encode(encodedImage, base64Data);
 
     return "data:" + mimeType + ";base64," + base64Data;
 }
 
 } // namespace WebCore