cc: Directly use property trees to calculate clip rect

cc/tiles/tile_manager_unittest.cc

Index: cc/tiles/tile_manager_unittest.cc
diff --git a/cc/tiles/tile_manager_unittest.cc b/cc/tiles/tile_manager_unittest.cc
index f1659a0f6bc355fdf5998c9c0d258248be7da3ef..d11cc30ebad6626f4d1fd9c97a6895a60b6ed821 100644
--- a/cc/tiles/tile_manager_unittest.cc
+++ b/cc/tiles/tile_manager_unittest.cc
@@ -42,6 +42,7 @@ class LowResTilingsSettings : public LayerTreeSettings {
  public:
   LowResTilingsSettings() {
     create_low_res_tiling = true;
+    verify_clip_tree_calculations = true;
   }
 };
 
@@ -1201,6 +1202,7 @@ TEST_F(TileManagerTilePriorityQueueTest,
 
   client.SetTileSize(gfx::Size(30, 30));
   LayerTreeSettings settings;
+  settings.verify_clip_tree_calculations = true;
 
   scoped_ptr<PictureLayerTilingSet> tiling_set = PictureLayerTilingSet::Create(
       ACTIVE_TREE, &client, settings.tiling_interest_area_padding,
@@ -1310,6 +1312,7 @@ TEST_F(TileManagerTilePriorityQueueTest,
 
   client.SetTileSize(gfx::Size(30, 30));
   LayerTreeSettings settings;
+  settings.verify_clip_tree_calculations = true;
 
   scoped_ptr<PictureLayerTilingSet> tiling_set = PictureLayerTilingSet::Create(
       ACTIVE_TREE, &client, settings.tiling_interest_area_padding,
@@ -1585,6 +1588,8 @@ class TileManagerTest : public testing::Test {
 
   void SetUp() override {
     LayerTreeSettings settings;
+    settings.verify_clip_tree_calculations = true;
+
     CustomizeSettings(&settings);
     host_impl_.reset(new MockLayerTreeHostImpl(settings, &task_runner_provider_,
                                                &shared_bitmap_manager_,