Clean up transform methods in GraphicsContext.

Source/core/rendering/ImageQualityController.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 171 matching lines @@
             m_liveResizeOptimizationIsActive = true;
             return true;
         }
         if (m_liveResizeOptimizationIsActive) {
             // Live resize has ended, paint in HQ and remove this object from the list.
             removeLayer(object, innerMap, layer);
             return false;
         }
     }
 
+    // See crbug.com/382491. This test is insufficient to ensure that there is no scale
+    // applied in the compositor, but it is probably adequate here. In the worst case we
+    // draw at high quality when we need not.
     if (!contextIsScaled && scaledLayoutSize == scaledImageSize) {
         // There is no scale in effect. If we had a scale in effect before, we can just remove this object from the list.
         removeLayer(object, innerMap, layer);
         return false;
     }
 
     // If an animated resize is active, paint in low quality and kick the timer ahead.
     if (m_animatedResizeIsActive) {
         set(object, innerMap, layer, scaledLayoutSize);
         restartTimer();
@@ skipping 16 matching lines @@
     // This object has been resized to two different sizes while the timer
     // is active, so draw at low quality, set the flag for animated resizes and
     // the object to the list for high quality redraw.
     set(object, innerMap, layer, scaledLayoutSize);
     m_animatedResizeIsActive = true;
     restartTimer();
     return true;
 }
 
 } // namespace WebCore