add new readPixels with direct memory parameters

src/utils/SkPictureUtils.cpp

Index: src/utils/SkPictureUtils.cpp
diff --git a/src/utils/SkPictureUtils.cpp b/src/utils/SkPictureUtils.cpp
index 78d70ca4ebfdacee50bf67a7f5796ca28dd0c013..fc1611d28891565cb4cba58f584242bcdab2ecfa 100644
--- a/src/utils/SkPictureUtils.cpp
+++ b/src/utils/SkPictureUtils.cpp
@@ -157,13 +157,6 @@ public:
     }
 
 protected:
-    virtual bool onReadPixels(const SkBitmap& bitmap,
-                              int x, int y,
-                              SkCanvas::Config8888 config8888) SK_OVERRIDE {
-        not_supported();
-        return false;
-    }
-
     virtual void replaceBitmapBackendForRasterSurface(const SkBitmap&) SK_OVERRIDE {
         not_supported();
     }