Update SkPicture cull rects with RTree information

src/core/SkRTree.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkRTree_DEFINED
 #define SkRTree_DEFINED
@@ skipping 34 matching lines @@
     void search(const SkRect& query, SkTDArray<unsigned>* results) const SK_OVERRIDE;
     size_t bytesUsed() const SK_OVERRIDE;
 
     // Methods and constants below here are only public for tests.
 
     // Return the depth of the tree structure.
     int getDepth() const { return fCount ? fRoot.fSubtree->fLevel + 1 : 0; }
     // Insertion count (not overall node count, which may be greater).
     int getCount() const { return fCount; }
 
+    // Get the root bound.
+    SkRect getRootBound() const SK_OVERRIDE;
+
     // These values were empirically determined to produce reasonable performance in most cases.
     static const int kMinChildren = 6,
                      kMaxChildren = 11;
 
 private:
     struct Node;
 
     struct Branch {
         union {
             Node* fSubtree;
@@ skipping 21 matching lines @@
     // This is the count of data elements (rather than total nodes in the tree)
     int fCount;
     SkScalar fAspectRatio;
     Branch fRoot;
     SkTDArray<Node> fNodes;
 
     typedef SkBBoxHierarchy INHERITED;
 };
 
 #endif