cc: Use multiple PrepareTiles approaches

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 <limits>
 
 #include "base/command_line.h"
@@ skipping 19 matching lines @@
       gpu_rasterization_forced(false),
       gpu_rasterization_msaa_sample_count(0),
       gpu_rasterization_skewport_target_time_in_seconds(0.2f),
       create_low_res_tiling(false),
       scrollbar_animator(NO_ANIMATOR),
       scrollbar_fade_delay_ms(0),
       scrollbar_fade_resize_delay_ms(0),
       scrollbar_fade_duration_ms(0),
       scrollbar_show_scale_threshold(1.0f),
       solid_color_scrollbar_color(SK_ColorWHITE),
-      timeout_and_draw_when_animation_checkerboards(true),
-      maximum_number_of_failed_draws_before_draw_is_forced_(3),
       layer_transforms_should_scale_layer_contents(false),
       layers_always_allowed_lcd_text(false),
       minimum_contents_scale(0.0625f),
       low_res_contents_scale_factor(0.25f),
       top_controls_show_threshold(0.5f),
       top_controls_hide_threshold(0.5f),
       background_animation_rate(1.0),
       max_partial_texture_updates(std::numeric_limits<size_t>::max()),
       default_tile_size(gfx::Size(256, 256)),
       max_untiled_layer_size(gfx::Size(512, 512)),
@@ skipping 23 matching lines @@
 
 LayerTreeSettings::~LayerTreeSettings() {}
 
 SchedulerSettings LayerTreeSettings::ToSchedulerSettings() const {
   SchedulerSettings scheduler_settings;
   scheduler_settings.use_external_begin_frame_source =
       use_external_begin_frame_source;
   scheduler_settings.main_frame_before_activation_enabled =
       main_frame_before_activation_enabled;
   scheduler_settings.impl_side_painting = impl_side_painting;
-  scheduler_settings.timeout_and_draw_when_animation_checkerboards =
-      timeout_and_draw_when_animation_checkerboards;
-  scheduler_settings.maximum_number_of_failed_draws_before_draw_is_forced_ =
-      maximum_number_of_failed_draws_before_draw_is_forced_;
   scheduler_settings.using_synchronous_renderer_compositor =
       using_synchronous_renderer_compositor;
   scheduler_settings.throttle_frame_production = throttle_frame_production;
   scheduler_settings.main_thread_should_always_be_low_latency = false;
   scheduler_settings.background_frame_interval =
       base::TimeDelta::FromSecondsD(1.0 / background_animation_rate);
   return scheduler_settings;
 }
 
 }  // namespace cc