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 c6c8e8eb2dbc00e2b6c37c6a0cd0d5ec0b2fd652..bf2840abfd9f3c56710601464014cdfe413f55f4 100644
--- a/cc/scheduler/scheduler_settings.cc
+++ b/cc/scheduler/scheduler_settings.cc
@@ -12,8 +12,6 @@ SchedulerSettings::SchedulerSettings()
     : use_external_begin_frame_source(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),
@@ -31,10 +29,6 @@ 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);