Staged removal of SkPicture-derived classes

src/core/SkQuadTreePicture.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 "SkQuadTreePicture.h"
 
 #include "SkQuadTree.h"
 
+SkBBoxHierarchy* SkQuadTreeFactory::operator()(int width, int height) const {
+    return SkNEW_ARGS(SkQuadTree, (SkIRect::MakeWH(width, height)));
+}
+
+#ifdef SK_SUPPORT_LEGACY_DERIVED_PICTURE_CLASSES
+
 SkBBoxHierarchy* SkQuadTreePicture::createBBoxHierarchy() const {
     return SkNEW_ARGS(SkQuadTree, (fBounds));
 }
+
+#endif