Removing a bunch of unused platform code.

Source/WebCore/platform/graphics/ShadowBlur.cpp

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Sencha, Inc. All rights reserved.
  * Copyright (C) 2010 Igalia S.L. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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
@@ skipping 879 matching lines @@
     blurAndColorShadowBuffer(expandedIntSize(m_layerSize));
     GraphicsContextStateSaver stateSave(*context);
 
     context->clearShadow();
     context->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, roundedIntPoint(m_layerOrigin), IntRect(0, 0, m_layerSize.width(), m_layerSize.height()), context->compositeOperation());
 
     m_layerImage = 0;
     ScratchBuffer::shared().scheduleScratchBufferPurge();
 }
 
-#if PLATFORM(QT)
-bool ShadowBlur::mustUseShadowBlur(GraphicsContext* context) const
-{
-    // We can't avoid ShadowBlur, since the shadow has blur.
-    if (type() == BlurShadow)
-        return true;
-    // We can avoid ShadowBlur and optimize, since we're not drawing on a
-    // canvas and box shadows are affected by the transformation matrix.
-    if (!shadowsIgnoreTransforms())
-        return false;
-    // We can avoid ShadowBlur, since there are no transformations to apply to the canvas.
-    if (context->getCTM().isIdentity())
-        return false;
-    // Otherwise, no chance avoiding ShadowBlur.
-    return true;
-}
-#endif
-
 } // namespace WebCore