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 58561a574c1694cb106876a8878d1fda35430c72..6d79e9ca97280d2328e926fd4482f3a3c67b9a69 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();
 
   scoped_ptr<base::Value> StateAsValue() {
     return state_machine_.AsValue().Pass();
@@ -107,6 +112,7 @@ class CC_EXPORT Scheduler {
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings);
 
+  void PostBeginFrameDeadline(base::TimeTicks deadline);
   void SetupNextBeginFrameIfNeeded();
   void DrawAndSwapIfPossible();
   void DrawAndSwapForced();
@@ -122,6 +128,7 @@ class CC_EXPORT Scheduler {
   // workaround.
   bool safe_to_expect_begin_frame_;
   BeginFrameArgs last_begin_frame_args_;
+  base::CancelableClosure begin_frame_deadline_closure_;
 
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;