Remove unused includes from core/platform .cpp files

Source/core/platform/graphics/Image.cpp

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 16 matching lines @@
 #include "config.h"
 #include "core/platform/graphics/Image.h"
 
 #include <math.h>
 #include "core/platform/Length.h"
 #include "core/platform/MIMETypeRegistry.h"
 #include "core/platform/PlatformMemoryInstrumentation.h"
 #include "core/platform/SharedBuffer.h"
 #include "core/platform/graphics/BitmapImage.h"
 #include "core/platform/graphics/GraphicsContext.h"
-#include "core/platform/graphics/ImageObserver.h"
 #include "core/platform/graphics/IntRect.h"
 #include "core/platform/graphics/transforms/AffineTransform.h"
 #include <wtf/MainThread.h>
 #include <wtf/MemoryObjectInfo.h>
 #include <wtf/StdLibExtras.h>
 
 namespace WebCore {
 
 Image::Image(ImageObserver* observer)
     : m_imageObserver(observer)
@@ skipping 144 matching lines @@
 
 void Image::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, PlatformMemoryTypes::Image);
     memoryObjectInfo->setClassName("Image");
     info.addMember(m_encodedImageData, "encodedImageData");
     info.addWeakPointer(m_imageObserver);
 }
 
 }