Fork cc::OutputSurface into cc::CompositorFrameSink.

cc/scheduler/scheduler_settings.h

 // Copyright 2013 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.
 
 #ifndef CC_SCHEDULER_SCHEDULER_SETTINGS_H_
 #define CC_SCHEDULER_SCHEDULER_SETTINGS_H_
 
 #include <memory>
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "cc/base/cc_export.h"
 
 namespace base {
 namespace trace_event {
 class ConvertableToTraceFormat;
 }
 }
 
 namespace cc {
 
 class CC_EXPORT SchedulerSettings {
  public:
   SchedulerSettings();
   SchedulerSettings(const SchedulerSettings& other);
   ~SchedulerSettings();
 
-  bool use_external_begin_frame_source;
-  bool main_frame_while_swap_throttled_enabled;
-  bool main_frame_before_activation_enabled;
-  bool commit_to_active_tree;
-  bool timeout_and_draw_when_animation_checkerboards;
-  bool using_synchronous_renderer_compositor;
-  bool throttle_frame_production;
-  bool abort_commit_before_output_surface_creation;
+  bool use_external_begin_frame_source = false;
+  bool main_frame_while_swap_throttled_enabled = false;
+  bool main_frame_before_activation_enabled = false;
+  bool commit_to_active_tree = false;
+  bool timeout_and_draw_when_animation_checkerboards = true;
+  bool using_synchronous_renderer_compositor = false;
+  bool throttle_frame_production = true;
+  bool abort_commit_before_compositor_frame_sink_creation = true;
 
-  int maximum_number_of_failed_draws_before_draw_is_forced;
-  base::TimeDelta background_frame_interval;
+  int maximum_number_of_failed_draws_before_draw_is_forced = 3;
+  base::TimeDelta background_frame_interval = base::TimeDelta::FromSeconds(1);
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_SETTINGS_H_