cc: Also trace the scheduler client state

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 84 matching lines @@
   bool RedrawPending() const { return state_machine_.RedrawPending(); }
   bool ManageTilesPending() const {
     return state_machine_.ManageTilesPending();
   }
   bool MainThreadIsInHighLatencyMode() const {
     return state_machine_.MainThreadIsInHighLatencyMode();
   }
 
   bool WillDrawIfNeeded() const;
 
-  base::TimeTicks AnticipatedDrawTime();
+  base::TimeTicks AnticipatedDrawTime() const;
 
   base::TimeTicks LastBeginImplFrameTime();
 
   void BeginImplFrame(const BeginFrameArgs& args);
   void OnBeginImplFrameDeadline();
   void PollForAnticipatedDrawTriggers();
 
-  scoped_ptr<base::Value> StateAsValue() {
-    return state_machine_.AsValue().Pass();
-  }
+  scoped_ptr<base::Value> StateAsValue() const;
 
   bool IsInsideAction(SchedulerStateMachine::Action action) {
     return inside_action_ == action;
   }
 
  private:
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings,
             int layer_tree_host_id);
 
@@ skipping 23 matching lines @@
   SchedulerStateMachine::Action inside_action_;
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_