Implement SkPicture::bytesUsed() for SkRecord backend

tests/PictureTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBBoxHierarchy.h"
 #include "SkBlurImageFilter.h"
 #include "SkCanvas.h"
@@ skipping 1789 matching lines @@
         this->searchCalls++;
     }
 
     // All other methods unimplemented.
     virtual void insert(void* data, const SkIRect& bounds, bool defer) {}
     virtual void flushDeferredInserts() {}
     virtual void clear() {}
     virtual int getCount() const { return 0; }
     virtual int getDepth() const { return 0; }
     virtual void rewindInserts() {}
+    virtual size_t bytesUsed() const { return 0; }
 };
 
 class SpoonFedBBHFactory : public SkBBHFactory {
 public:
     explicit SpoonFedBBHFactory(SkBBoxHierarchy* bbh) : fBBH(bbh) {}
     virtual SkBBoxHierarchy* operator()(int width, int height) const {
         return SkRef(fBBH);
     }
 private:
     SkBBoxHierarchy* fBBH;
 };
 
 // When the canvas clip covers the full picture, we don't need to call the BBH.
 DEF_TEST(Picture_SkipBBH, r) {
     CountingBBH bbh;
     SpoonFedBBHFactory factory(&bbh);
 
     SkPictureRecorder recorder;
     recorder.beginRecording(320, 240, &factory);
     SkAutoTUnref<const SkPicture> picture(recorder.endRecording());
 
     SkCanvas big(640, 480), small(300, 200);
 
     picture->draw(&big);
     REPORTER_ASSERT(r, bbh.searchCalls == 0);
 
     picture->draw(&small);
     REPORTER_ASSERT(r, bbh.searchCalls == 1);
 }