Update SkPicture cull rects with RTree information

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 1230 matching lines @@
     replayCanvas.flush();
 
     // With the bug present, at (55, 55) we would get a fully opaque red
     // intead of a dark red.
     REPORTER_ASSERT(reporter, replayBM.getColor(30, 30) == 0xff000080);
     REPORTER_ASSERT(reporter, replayBM.getColor(55, 55) == 0xff800000);
 }
 
 struct CountingBBH : public SkBBoxHierarchy {
     mutable int searchCalls;
+    SkRect rootBound;
 
-    CountingBBH() : searchCalls(0) {}
+    CountingBBH(const SkRect& bound) : searchCalls(0), rootBound(bound) {}
 
     void search(const SkRect& query, SkTDArray<unsigned>* results) const SK_OVERRIDE {
         this->searchCalls++;
     }
 
     void insert(const SkRect[], int) SK_OVERRIDE {}
     virtual size_t bytesUsed() const SK_OVERRIDE { return 0; }
+    SkRect getRootBound() const SK_OVERRIDE { return rootBound; }
 };
 
 class SpoonFedBBHFactory : public SkBBHFactory {
 public:
     explicit SpoonFedBBHFactory(SkBBoxHierarchy* bbh) : fBBH(bbh) {}
     SkBBoxHierarchy* operator()(const SkRect&) const SK_OVERRIDE {
         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;
+    SkRect bound = SkRect::MakeWH(320, 240);
+    CountingBBH bbh(bound);
     SpoonFedBBHFactory factory(&bbh);
 
     SkPictureRecorder recorder;
-    recorder.beginRecording(320, 240, &factory);
+    recorder.beginRecording(bound, &factory);
     SkAutoTUnref<const SkPicture> picture(recorder.endRecording());
 
     SkCanvas big(640, 480), small(300, 200);
 
     picture->playback(&big);
     REPORTER_ASSERT(r, bbh.searchCalls == 0);
 
     picture->playback(&small);
     REPORTER_ASSERT(r, bbh.searchCalls == 1);
 }
@@ skipping 23 matching lines @@
 
     // The picture shares the immutable pixels but copies the mutable ones.
     REPORTER_ASSERT(r, mut.pixelRef()->unique());
     REPORTER_ASSERT(r, !immut.pixelRef()->unique());
 
     // When the picture goes away, it's just our bitmaps holding the refs.
     pic.reset(NULL);
     REPORTER_ASSERT(r, mut.pixelRef()->unique());
     REPORTER_ASSERT(r, immut.pixelRef()->unique());
 }