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 23d7afd7a210ddcf3bc29904478316a284094baa..96fb50c8b58ce5ab2e1980a5aa96b946b1f3b355 100644
--- a/src/utils/SkPictureUtils.cpp
+++ b/src/utils/SkPictureUtils.cpp
@@ -164,13 +164,6 @@ 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();
     }