cc: Directly use property trees to calculate clip rect

cc/layers/picture_layer_impl_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/picture_layer_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <limits>
@@ skipping 65 matching lines @@
     rects_.push_back(rect);
   }
 
   std::vector<SkRect> rects_;
 };
 
 class PictureLayerImplTestSettings : public GpuRasterizationEnabledSettings {
  public:
   PictureLayerImplTestSettings() {
     layer_transforms_should_scale_layer_contents = true;
+    verify_clip_tree_calculations = true;
   }
 };
 
 class NoLowResTilingsSettings : public PictureLayerImplTestSettings {};
 
 class LowResTilingsSettings : public PictureLayerImplTestSettings {
  public:
   LowResTilingsSettings() { create_low_res_tiling = true; }
 };
 
@@ skipping 4826 matching lines @@
   // New low res tiling.
   EXPECT_TRUE(tilings->tiling_at(2)->may_contain_low_resolution_tiles());
 
   // This tiling will be high res now, it won't contain low res content since it
   // was all destroyed.
   EXPECT_FALSE(tilings->tiling_at(1)->may_contain_low_resolution_tiles());
 }
 
 }  // namespace
 }  // namespace cc