cc: Directly use property trees to calculate clip rect

cc/trees/layer_tree_host_common.cc

Index: cc/trees/layer_tree_host_common.cc
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc
index 5a682de7289edc0a19529adbf17e84a0a43938e8..94f360fcb9c7d2dfdf119758393c65d27a25e81f 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -82,6 +82,7 @@ LayerTreeHostCommon::CalcDrawPropsImplInputs::CalcDrawPropsImplInputs(
     bool layers_always_allowed_lcd_text,
     bool can_render_to_separate_surface,
     bool can_adjust_raster_scales,
+    bool verify_clip_tree_calculations,
     LayerImplList* render_surface_layer_list,
     PropertyTrees* property_trees)
     : root_layer(root_layer),
@@ -100,6 +101,7 @@ LayerTreeHostCommon::CalcDrawPropsImplInputs::CalcDrawPropsImplInputs(
       layers_always_allowed_lcd_text(layers_always_allowed_lcd_text),
       can_render_to_separate_surface(can_render_to_separate_surface),
       can_adjust_raster_scales(can_adjust_raster_scales),
+      verify_clip_tree_calculations(verify_clip_tree_calculations),
       render_surface_layer_list(render_surface_layer_list),
       property_trees(property_trees) {}
 
@@ -123,6 +125,7 @@ LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting::
                               false,
                               true,
                               false,
+                              true,
                               render_surface_layer_list,
                               GetPropertyTrees(root_layer)) {
   DCHECK(root_layer);
@@ -607,6 +610,10 @@ void CalculateDrawPropertiesInternal(
       inputs->render_surface_layer_list, inputs->can_render_to_separate_surface,
       inputs->max_texture_size);
 
+  if (inputs->verify_clip_tree_calculations)
+    draw_property_utils::VerifyClipTreeCalculations(visible_layer_list,
+                                                    inputs->property_trees);
+
   if (should_measure_property_tree_performance) {
     TRACE_EVENT_END0(TRACE_DISABLED_BY_DEFAULT("cc.debug.cdp-perf"),
                      "LayerTreeHostCommon::CalculateDrawProperties");