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 d2c3bda2b9c45c1340f5276ff59dd8b85855b1dd..93ad93336ae12b4ae08443a54fdc8efe82172df2 100644
--- a/cc/trees/layer_tree_settings.cc
+++ b/cc/trees/layer_tree_settings.cc
@@ -37,8 +37,6 @@ 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),
@@ -82,10 +80,6 @@ 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;