add new readPixels with direct memory parameters

src/utils/SkGatherPixelRefsAndRects.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGatherPixelRefsAndRects_DEFINED
 #define SkGatherPixelRefsAndRects_DEFINED
 
@@ skipping 279 matching lines @@
         this->drawPoints(draw, SkCanvas::kPolygon_PointMode, vertexCount, verts, paint);
     }
     virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
                             const SkPaint&) SK_OVERRIDE {
         NothingToDo();
     }
     // TODO: allow this call to return failure, or move to SkBitmapDevice only.
     virtual const SkBitmap& onAccessBitmap() SK_OVERRIDE {
         return fEmptyBitmap;
     }
-    virtual bool onReadPixels(const SkBitmap& bitmap,
-                              int x, int y,
-                              SkCanvas::Config8888 config8888) SK_OVERRIDE {
-        NotSupported();
-        return false;
-    }
     virtual void lockPixels() SK_OVERRIDE { NothingToDo(); }
     virtual void unlockPixels() SK_OVERRIDE { NothingToDo(); }
     virtual bool allowImageFilter(const SkImageFilter*) SK_OVERRIDE { return false; }
     virtual bool canHandleImageFilter(const SkImageFilter*) SK_OVERRIDE { return false; }
     virtual bool filterImage(const SkImageFilter*, const SkBitmap&, const SkImageFilter::Context&,
                              SkBitmap* result, SkIPoint* offset) SK_OVERRIDE {
         return false;
     }
 
 private:
@@ skipping 28 matching lines @@
     static void NotSupported() {
         SkDEBUGFAIL("this method should never be called");
     }
 
     static void NothingToDo() {}
 
     typedef SkBaseDevice INHERITED;
 };
 
 #endif // SkGatherPixelRefsAndRects_DEFINED