Add vsync notification command line switch

cc/trees/layer_tree_settings.h

 // Copyright 2011 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_TREES_LAYER_TREE_SETTINGS_H_
 #define CC_TREES_LAYER_TREE_SETTINGS_H_
 
 #include "base/basictypes.h"
 #include "cc/base/cc_export.h"
 #include "cc/debug/layer_tree_debug_state.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
 class CC_EXPORT LayerTreeSettings {
  public:
   LayerTreeSettings();
   ~LayerTreeSettings();
 
   bool accelerate_painting;
   bool compositor_frame_message;
   bool impl_side_painting;
   bool render_vsync_enabled;
+  bool render_vsync_notification_enabled;
   bool per_tile_painting_enabled;
   bool partial_swap_enabled;
   bool cache_render_pass_contents;
   bool right_aligned_scheduling_enabled;
   bool accelerated_animation_enabled;
   bool background_color_instead_of_checkerboard;
   bool show_overdraw_in_tracing;
   bool can_use_lcd_text;
   bool should_clear_root_render_pass;
   bool use_linear_fade_scrollbar_animator;
@@ skipping 17 matching lines @@
   gfx::Size max_untiled_layer_size;
   gfx::Size minimum_occlusion_tracking_size;
   bool use_pinch_zoom_scrollbars;
 
   LayerTreeDebugState initial_debug_state;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_SETTINGS_H_