Expand pixelref to return SkImageInfo and rowbytes

include/gpu/SkGrPixelRef.h

Index: include/gpu/SkGrPixelRef.h
diff --git a/include/gpu/SkGrPixelRef.h b/include/gpu/SkGrPixelRef.h
index da4b8fae090dfab8d0fd6860426a612a5d5de52f..7c8c4ab0d082f44986d43dd72189cfc3f6bf88ed 100644
--- a/include/gpu/SkGrPixelRef.h
+++ b/include/gpu/SkGrPixelRef.h
@@ -27,10 +27,10 @@ public:
     virtual ~SkROLockPixelsPixelRef();
 
 protected:
-    // override from SkPixelRef
-    virtual void* onLockPixels(SkColorTable** ptr);
-    virtual void onUnlockPixels();
-    virtual bool onLockPixelsAreWritable() const;   // return false;
+    virtual bool onGetInfo(SkImageInfo*) SK_OVERRIDE;
+    virtual bool onNewLockPixels(LockRec*) SK_OVERRIDE;
+    virtual void onUnlockPixels() SK_OVERRIDE;
+    virtual bool onLockPixelsAreWritable() const SK_OVERRIDE;   // return false;
 
 private:
     SkBitmap    fBitmap;