Add SkCanvas::writePixels that takes info+pixels directly

include/core/SkDevice.h

Index: include/core/SkDevice.h
diff --git a/include/core/SkDevice.h b/include/core/SkDevice.h
index 899c5d37540c5f6cf059229f8bbffcb8ec7aa384..68dae2d4703e7cf07cabe598a001d43effd71dfb 100644
--- a/include/core/SkDevice.h
+++ b/include/core/SkDevice.h
@@ -134,6 +134,8 @@ public:
     virtual void writePixels(const SkBitmap& bitmap, int x, int y,
                              SkCanvas::Config8888 config8888 = SkCanvas::kNative_Premul_Config8888) = 0;
 
+    bool writePixelsDirect(const SkImageInfo&, const void*, size_t rowBytes, int x, int y);
+
     /**
      * Return the device's associated gpu render target, or NULL.
      */
@@ -387,6 +389,8 @@ protected:
     // default impl returns NULL
     virtual const void* peekPixels(SkImageInfo*, size_t* rowBytes);
 
+    virtual bool onWritePixelsDirect(const SkImageInfo&, const void*, size_t, int x, int y);
+
     /**
      *  Leaky properties are those which the device should be applying but it isn't.
      *  These properties will be applied by the draw, when and as it can.