cc: Implement deadine scheduling disabled by default

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index e740eb7c078c6399aa47e2a9b46195f45f1d0ee5..66e26efbc9ee25e16ced800410a39b8b375f5dfc 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/cancelable_callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "cc/base/cc_export.h"
@@ -46,6 +47,9 @@ class SchedulerClient {
   virtual base::TimeDelta DrawDurationEstimate() = 0;
   virtual base::TimeDelta BeginFrameToCommitDurationEstimate() = 0;
   virtual base::TimeDelta CommitToActivateDurationEstimate() = 0;
+  virtual void PostBeginFrameDeadline(const base::Closure& closure,
+                                      base::TimeTicks deadline) = 0;
+  virtual void DidBeginFrameDeadlineOnImplThread() = 0;
 
  protected:
   virtual ~SchedulerClient() {}
@@ -98,6 +102,7 @@ class CC_EXPORT Scheduler {
   base::TimeTicks LastBeginFrameOnImplThreadTime();
 
   void BeginFrame(const BeginFrameArgs& args);
+  void OnBeginFrameDeadline();
   void PollForAnticipatedDrawTriggers();
 
   scoped_ptr<base::Value> StateAsValue() {
@@ -108,7 +113,9 @@ class CC_EXPORT Scheduler {
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings);
 
+  void PostBeginFrameDeadline(base::TimeTicks deadline);
   void SetupNextBeginFrameIfNeeded();
+  void ActivatePendingTree();
   void DrawAndSwapIfPossible();
   void DrawAndSwapForced();
   void DrawAndReadback();
@@ -119,8 +126,9 @@ class CC_EXPORT Scheduler {
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
   bool last_set_needs_begin_frame_;
-  bool has_pending_begin_frame_;
+  int begin_frame_did_not_swap_count_;
   BeginFrameArgs last_begin_frame_args_;
+  base::CancelableClosure begin_frame_deadline_closure_;
   base::CancelableClosure poll_for_draw_triggers_closure_;
 
   SchedulerStateMachine state_machine_;