cc: Directly use property trees to calculate clip rect

cc/trees/layer_tree_settings.cc

 // Copyright 2011 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/trees/layer_tree_settings.h"
 
 #include <GLES2/gl2.h>
 #include <stddef.h>
 #include <limits>
 
@@ skipping 79 matching lines @@
       strict_layer_property_change_checking(false),
       use_zero_copy(false),
       use_partial_raster(false),
       enable_elastic_overscroll(false),
       use_image_texture_targets(
           static_cast<size_t>(gfx::BufferFormat::LAST) + 1,
           GL_TEXTURE_2D),
       ignore_root_layer_flings(false),
       scheduled_raster_task_limit(32),
       use_occlusion_for_tile_prioritization(false),
+      verify_clip_tree_calculations(false),
       image_decode_tasks_enabled(false),
       wait_for_beginframe_interval(true),
       abort_commit_before_output_surface_creation(true),
       use_mouse_wheel_gestures(false),
       max_staging_buffer_usage_in_bytes(32 * 1024 * 1024),
       memory_policy_(64 * 1024 * 1024,
                      gpu::MemoryAllocation::CUTOFF_ALLOW_EVERYTHING,
                      ManagedMemoryPolicy::kDefaultNumResourcesLimit) {}
 
 LayerTreeSettings::LayerTreeSettings(const LayerTreeSettings& other) = default;
@@ skipping 47 matching lines @@
          strict_layer_property_change_checking ==
              other.strict_layer_property_change_checking &&
          use_zero_copy == other.use_zero_copy &&
          use_partial_raster == other.use_partial_raster &&
          enable_elastic_overscroll == other.enable_elastic_overscroll &&
          use_image_texture_targets == other.use_image_texture_targets &&
          ignore_root_layer_flings == other.ignore_root_layer_flings &&
          scheduled_raster_task_limit == other.scheduled_raster_task_limit &&
          use_occlusion_for_tile_prioritization ==
              other.use_occlusion_for_tile_prioritization &&
+         verify_clip_tree_calculations == other.verify_clip_tree_calculations &&
          image_decode_tasks_enabled == other.image_decode_tasks_enabled &&
          wait_for_beginframe_interval == other.wait_for_beginframe_interval &&
          use_mouse_wheel_gestures == other.use_mouse_wheel_gestures &&
          max_staging_buffer_usage_in_bytes ==
              other.max_staging_buffer_usage_in_bytes &&
          memory_policy_ == other.memory_policy_ &&
          LayerTreeDebugState::Equal(initial_debug_state,
                                     other.initial_debug_state);
 }
 
@@ skipping 134 matching lines @@
       using_synchronous_renderer_compositor;
   scheduler_settings.throttle_frame_production = wait_for_beginframe_interval;
   scheduler_settings.background_frame_interval =
       base::TimeDelta::FromSecondsD(1.0 / background_animation_rate);
   scheduler_settings.abort_commit_before_output_surface_creation =
       abort_commit_before_output_surface_creation;
   return scheduler_settings;
 }
 
 }  // namespace cc