Implement SkPicture::bytesUsed() for SkRecord backend

src/core/SkQuadTree.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 "SkQuadTree.h"
 #include "SkTSort.h"
 #include <stdio.h>
@@ skipping 190 matching lines @@
         Entry* entry = entries.pop();
         if (fClient->shouldRewind(entry->fData)) {
             entry->fData = NULL;
             fEntryPool.release(entry);
         } else {
             fDeferred.push(entry);
         }
     }
 }
 
+size_t SkQuadTree::bytesUsed() const {
+    size_t byteCount = sizeof(SkQuadTree);
+    byteCount += fEntryPool.allocated() * sizeof(Entry);
+    byteCount += fNodePool.allocated() * sizeof(Node);
+    byteCount += fDeferred.getCount() * sizeof(Entry);
+    return byteCount;
+}
+
 void SkQuadTree::flushDeferredInserts() {
     if (NULL == fRoot) {
         fRoot = fNodePool.acquire();
         fRoot->fBounds = fRootBounds;
     }
     while(!fDeferred.isEmpty()) {
         this->insert(fRoot, fDeferred.pop());
     }
 }