ImageBuffer-less SVG masking and clipping.

Source/core/platform/graphics/GraphicsContext.h

Index: Source/core/platform/graphics/GraphicsContext.h
diff --git a/Source/core/platform/graphics/GraphicsContext.h b/Source/core/platform/graphics/GraphicsContext.h
index b91c7e6b60245eea6e9bd9aba3b6a6773bac7b68..6567b5a541e497051721cba684307321884bc3dc 100644
--- a/Source/core/platform/graphics/GraphicsContext.h
+++ b/Source/core/platform/graphics/GraphicsContext.h
@@ -278,7 +278,6 @@ public:
     void clipOutRoundedRect(const RoundedRect&);
     void clipPath(const Path&, WindRule = RULE_EVENODD);
     void clipConvexPolygon(size_t numPoints, const FloatPoint*, bool antialias = true);
-    void clipToImageBuffer(const ImageBuffer*, const FloatRect&);
     bool clipRect(const SkRect&, AntiAliasingMode = NotAntiAliased, SkRegion::Op = SkRegion::kIntersect_Op);
 
     void drawText(const Font&, const TextRunPaintInfo&, const FloatPoint&);
@@ -408,11 +407,6 @@ private:
 
     bool concat(const SkMatrix&);
 
-    // Used when restoring and the state has an image clip. Only shows the pixels in
-    // m_canvas that are also in imageBuffer.
-    // The clipping rectangle is given in absolute coordinates.
-    void applyClipFromImage(const SkRect&, const SkBitmap&);
-
     // common code between setupPaintFor[Filling,Stroking]
     void setupShader(SkPaint*, Gradient*, Pattern*, SkColor) const;