Expand pixelref to return SkImageInfo and rowbytes

src/lazy/SkDiscardablePixelRef.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDiscardablePixelRef_DEFINED
 #define SkDiscardablePixelRef_DEFINED
 
@@ skipping 32 matching lines @@
      *  @return true iff successful.
      */
     static bool Install(SkImageGenerator* generator,
                         SkBitmap* destination,
                         SkDiscardableMemory::Factory* factory = NULL);
 
     SK_DECLARE_UNFLATTENABLE_OBJECT()
 
 protected:
     ~SkDiscardablePixelRef();
-    virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE;
+
+    virtual bool onNewLockPixels(LockRec*) SK_OVERRIDE;
     virtual void onUnlockPixels() SK_OVERRIDE;
     virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; }
 
     virtual SkData* onRefEncodedData() SK_OVERRIDE {
         return fGenerator->refEncodedData();
     }
 
 private:
     SkImageGenerator* const fGenerator;
     SkDiscardableMemory::Factory* const fDMFactory;
-    const SkImageInfo fInfo;
-    const size_t fSize;  // size of memory to be allocated
     const size_t fRowBytes;
     // These const members should not change over the life of the
     // PixelRef, since the SkBitmap doesn't expect them to change.
 
     SkDiscardableMemory* fDiscardableMemory;
 
     /* Takes ownership of SkImageGenerator. */
     SkDiscardablePixelRef(SkImageGenerator* generator,
                           const SkImageInfo& info,
-                          size_t size,
                           size_t rowBytes,
                           SkDiscardableMemory::Factory* factory);
+
+    typedef SkPixelRef INHERITED;
 };
+
 #endif  // SkDiscardablePixelRef_DEFINED