cc: Use multiple PrepareTiles approaches

cc/scheduler/scheduler_settings.cc

Index: cc/scheduler/scheduler_settings.cc
diff --git a/cc/scheduler/scheduler_settings.cc b/cc/scheduler/scheduler_settings.cc
index 266ef1fedc9b4ec8b57baa5164b73ce973c21a7a..b98400201d21deb70c1ba0581319af56eafa50fb 100644
--- a/cc/scheduler/scheduler_settings.cc
+++ b/cc/scheduler/scheduler_settings.cc
@@ -13,8 +13,6 @@ SchedulerSettings::SchedulerSettings()
       main_frame_while_swap_throttled_enabled(false),
       main_frame_before_activation_enabled(false),
       impl_side_painting(false),
-      timeout_and_draw_when_animation_checkerboards(true),
-      maximum_number_of_failed_draws_before_draw_is_forced_(3),
       using_synchronous_renderer_compositor(false),
       throttle_frame_production(true),
       main_thread_should_always_be_low_latency(false),
@@ -34,10 +32,6 @@ SchedulerSettings::AsValue() const {
   state->SetBoolean("main_frame_before_activation_enabled",
                     main_frame_before_activation_enabled);
   state->SetBoolean("impl_side_painting", impl_side_painting);
-  state->SetBoolean("timeout_and_draw_when_animation_checkerboards",
-                    timeout_and_draw_when_animation_checkerboards);
-  state->SetInteger("maximum_number_of_failed_draws_before_draw_is_forced_",
-                    maximum_number_of_failed_draws_before_draw_is_forced_);
   state->SetBoolean("using_synchronous_renderer_compositor",
                     using_synchronous_renderer_compositor);
   state->SetBoolean("throttle_frame_production", throttle_frame_production);