Add SkBBoxHierarchy::reserve() as an optional size hint.

src/core/SkRecordDraw.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRecordDraw.h"
 #include "SkPatchUtils.h"
 
@@ skipping 144 matching lines @@
             this->popSaveBlock();
         }
 
         // Any control ops not part of any Save/Restore block draw everywhere.
         while (!fControlIndices.isEmpty()) {
             this->popControl(kUnbounded);
         }
 
         // Finally feed all stored bounds into the BBH.  They'll be returned in this order.
         SkASSERT(bbh);
+        bbh->reserve(record.count());
         for (unsigned i = 0; i < record.count(); i++) {
             if (!fBounds[i].isEmpty()) {
                 bbh->insert(i, fBounds[i], true/*ok to defer*/);
             }
         }
         bbh->flushDeferredInserts();
     }
 
     template <typename T> void operator()(const T& op) {
         this->updateCTM(op);
@@ skipping 370 matching lines @@
     // Used to track the bounds of Save/Restore blocks and the control ops inside them.
     SkTDArray<SaveBounds> fSaveStack;
     SkTDArray<unsigned>   fControlIndices;
 };
 
 }  // namespace SkRecords
 
 void SkRecordFillBounds(const SkRecord& record, SkBBoxHierarchy* bbh) {
     SkRecords::FillBounds(record, bbh);
 }