Remove unused includes from various .cpp files in core/

Source/core/page/scrolling/ScrollingCoordinator.cpp

 /*
  * Copyright (C) 2011 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #include "config.h"
 
 #include "core/page/scrolling/ScrollingCoordinator.h"
 
 #include "core/dom/Document.h"
 #include "core/page/Frame.h"
 #include "core/page/FrameView.h"
 #include "core/page/Page.h"
 #include "core/platform/PlatformWheelEvent.h"
-#include "core/platform/ScrollAnimator.h"
 #include "core/platform/ScrollbarThemeComposite.h"
 #include "core/platform/chromium/support/WebScrollbarImpl.h"
 #include "core/platform/chromium/support/WebScrollbarThemeGeometryNative.h"
 #include "core/platform/graphics/GraphicsLayer.h"
 #include "core/platform/graphics/IntRect.h"
 #include "core/platform/graphics/Region.h"
 #include "core/plugins/PluginView.h"
 #include "core/rendering/RenderLayerBacking.h"
 #include "core/rendering/RenderLayerCompositor.h"
 #include "core/rendering/RenderView.h"
@@ skipping 588 matching lines @@
         stringBuilder.resize(stringBuilder.length() - 2);
     return stringBuilder.toString();
 }
 
 String ScrollingCoordinator::mainThreadScrollingReasonsAsText() const
 {
     return mainThreadScrollingReasonsAsText(mainThreadScrollingReasons());
 }
 
 } // namespace WebCore