cc: Remove safe_to_expect_begin_frame workaround

cc/scheduler/scheduler.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_H_
 #define CC_SCHEDULER_SCHEDULER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 101 matching lines @@
   void DrawAndSwapForced();
   void DrawAndReadback();
   void ProcessScheduledActions();
 
   const SchedulerSettings settings_;
   SchedulerClient* client_;
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
   bool last_set_needs_begin_frame_;
   bool has_pending_begin_frame_;
-  // TODO(brianderson): crbug.com/249806 : Remove safe_to_expect_begin_frame_
-  // workaround.
-  bool safe_to_expect_begin_frame_;
   BeginFrameArgs last_begin_frame_args_;
 
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_