SP: antialias images regardless of CTM.

Source/platform/graphics/GraphicsContext.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 262 matching lines @@
     void concatCTM(const AffineTransform&);
     void setCTM(const AffineTransform&);
     void setMatrix(const SkMatrix&);
 
     void scale(float x, float y);
     void rotate(float angleInRadians);
     void translate(float x, float y);
     // ---------- End transformation methods -----------------
 
     SkFilterQuality computeFilterQuality(Image*, const FloatRect& dest, const FloatRect& src) const;
-    bool shouldAntialiasImages() { return shouldAntialias() && !getTotalMatrix().rectStaysRect();}
+    bool shouldAntialiasImages() { return shouldAntialias(); }

[f(malita), 2015/06/15 16:17:48]

We might as well drop shouldAntialiasImages() at this point.

 
     // URL drawing
     void setURLForRect(const KURL&, const IntRect&);
     void setURLFragmentForRect(const String& name, const IntRect&);
     void addURLTargetAtPoint(const String& name, const IntPoint&);
 
     static void adjustLineToPixelBoundaries(FloatPoint& p1, FloatPoint& p2, float strokeWidth, StrokeStyle);
 
     static int focusRingOutsetExtent(int offset, int width)
     {
@@ skipping 111 matching lines @@
 
     float m_deviceScaleFactor;
 
     unsigned m_printing : 1;
     unsigned m_hasMetaData : 1;
 };
 
 } // namespace blink
 
 #endif // GraphicsContext_h