Add SkCanvas::writePixels that takes info+pixels directly

include/gpu/SkGpuDevice.h

Index: include/gpu/SkGpuDevice.h
diff --git a/include/gpu/SkGpuDevice.h b/include/gpu/SkGpuDevice.h
index 3ccab51831dca58f17df7bd4a114b49d1da7392e..64bd33f439e8f9cd496529efd05408eb85fdcc4f 100644
--- a/include/gpu/SkGpuDevice.h
+++ b/include/gpu/SkGpuDevice.h
@@ -90,9 +90,10 @@ public:
     virtual SkBitmap::Config config() const SK_OVERRIDE;
 
     virtual void clear(SkColor color) SK_OVERRIDE;
+#ifdef SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG
     virtual void writePixels(const SkBitmap& bitmap, int x, int y,
                              SkCanvas::Config8888 config8888) SK_OVERRIDE;
-
+#endif
     virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE;
     virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
                             const SkPoint[], const SkPaint& paint) SK_OVERRIDE;
@@ -148,10 +149,8 @@ public:
     class SkAutoCachedTexture; // used internally
 
 protected:
-    // overrides from SkBaseDevice
-    virtual bool onReadPixels(const SkBitmap& bitmap,
-                              int x, int y,
-                              SkCanvas::Config8888 config8888) SK_OVERRIDE;
+    virtual bool onReadPixels(const SkBitmap&, int x, int y, SkCanvas::Config8888) SK_OVERRIDE;
+    virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
 
 private:
     GrContext*      fContext;