Roll Chrome into Mojo.

cc/scheduler/scheduler_state_machine.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_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 #define CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 106 matching lines @@
   scoped_refptr<base::debug::ConvertableToTraceFormat> AsValue() const;
   void AsValueInto(base::debug::TracedValue* dict, base::TimeTicks now) const;
 
   Action NextAction() const;
   void UpdateState(Action action);
 
   // Indicates whether the impl thread needs a BeginImplFrame callback in order
   // to make progress.
   bool BeginFrameNeeded() const;
 
+  // Indicates whether the scheduler should call
+  // SetNeedsBeginFrames(BeginFrameNeeded()) on the frame source.
+  bool ShouldSetNeedsBeginFrames(bool frame_source_needs_begin_frames) const;
+
   // Indicates that we need to independently poll for new state and actions
   // because we can't expect a BeginImplFrame. This is mostly used to avoid
   // drawing repeat frames with the synchronous compositor without dropping
   // necessary actions on the floor.
   bool ShouldPollForAnticipatedDrawTriggers() const;
 
   // Indicates that the system has entered and left a BeginImplFrame callback.
   // The scheduler will not draw more than once in a given BeginImplFrame
   // callback nor send more than one BeginMainFrame message.
   void OnBeginImplFrame(const BeginFrameArgs& args);
@@ skipping 13 matching lines @@
   // avoid requesting BeginImplFrames when we won't actually draw but still
   // need to advance our state at vsync intervals.
   void DidEnterPollForAnticipatedDrawTriggers();
   void DidLeavePollForAnticipatedDrawTriggers();
   bool inside_poll_for_anticipated_draw_triggers() const {
     return inside_poll_for_anticipated_draw_triggers_;
   }
 
   // Indicates whether the LayerTreeHostImpl is visible.
   void SetVisible(bool visible);
+  bool visible() const { return visible_; }
 
   // Indicates that a redraw is required, either due to the impl tree changing
   // or the screen being damaged and simply needing redisplay.
   void SetNeedsRedraw();
   bool needs_redraw() const { return needs_redraw_; }
 
   void SetNeedsAnimate();
   bool needs_animate() const { return needs_animate_; }
 
   // Indicates that prepare-tiles is required. This guarantees another
@@ skipping 167 matching lines @@
   bool impl_latency_takes_priority_on_battery_;
   bool children_need_begin_frames_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_