cc: Use multiple PrepareTiles approaches

cc/trees/layer_tree_settings.cc

Index: cc/trees/layer_tree_settings.cc
diff --git a/cc/trees/layer_tree_settings.cc b/cc/trees/layer_tree_settings.cc
index 80f2af7e88d8b5bbc03b9d2c614027d0ad821a33..60abd62e4570a3adddf29a5c43001751a16179ed 100644
--- a/cc/trees/layer_tree_settings.cc
+++ b/cc/trees/layer_tree_settings.cc
@@ -43,8 +43,6 @@ LayerTreeSettings::LayerTreeSettings()
       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),
@@ -88,10 +86,6 @@ SchedulerSettings LayerTreeSettings::ToSchedulerSettings() const {
   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;