Add SkImage->draw() call with src and dst rects.

src/image/SkImage_Gpu.cpp

Index: src/image/SkImage_Gpu.cpp
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index b6e4211d28fc422501ed3c79449a98ec393c5c82..d19d2100c3000b5c8dceef341fead9c3281df819 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -21,6 +21,7 @@ public:
     virtual ~SkImage_Gpu();
 
     virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*) SK_OVERRIDE;
+    virtual void onDrawRectToRect(SkCanvas*, const SkRect* src, const SkRect& dst, const SkPaint*) SK_OVERRIDE;
     virtual GrTexture* onGetTexture() SK_OVERRIDE;
     virtual bool getROPixels(SkBitmap*) const SK_OVERRIDE {
         // TODO
@@ -61,6 +62,11 @@ void SkImage_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
     canvas->drawBitmap(fBitmap, x, y, paint);
 }
 
+void SkImage_Gpu::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
+                         const SkPaint* paint) {
+    canvas->drawBitmapRectToRect(fBitmap, src, dst, paint);
+}
+
 GrTexture* SkImage_Gpu::onGetTexture() {
     return fTexture;
 }