cc : Clean up cc clip tree

cc/layers/layer_impl_unittest.cc

Index: cc/layers/layer_impl_unittest.cc
diff --git a/cc/layers/layer_impl_unittest.cc b/cc/layers/layer_impl_unittest.cc
index b51fae0069a063ef3f43ab304907bc76f0ce59d9..6efa7130943d4651e368e0c2c3db48c19499c260 100644
--- a/cc/layers/layer_impl_unittest.cc
+++ b/cc/layers/layer_impl_unittest.cc
@@ -139,6 +139,7 @@ TEST(LayerImplTest, VerifyLayerChangesAreTrackedProperly) {
   host_impl.active_tree()->SetRootLayerForTesting(std::move(root_clip_ptr));
 
   root->test_properties()->force_render_surface = true;
+  root->SetMasksToBounds(true);

[weiliangc, 2017/03/14 22:04:29]

Why is set maskstobounds needed here?

[jaydasika, 2017/03/16 20:33:30]

To make root get a clip node, otherwise when we change this later in this test,
we have to rebuild property trees instead of just updating.

   root->layer_tree_impl()->ResetAllChangeTracking();
 
   root->test_properties()->AddChild(
@@ -443,7 +444,6 @@ class LayerImplScrollTest : public testing::Test {
 
   LayerTreeSettings settings() {
     LayerTreeSettings settings;
-    settings.verify_clip_tree_calculations = true;
     return settings;
   }