cc:: Add RenderingStatsInstrumentation to manage collection of RenderingStats

cc/base/worker_pool.h

 // Copyright 2013 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_BASE_WORKER_POOL_H_
 #define CC_BASE_WORKER_POOL_H_
 
 #include <string>
 
 #include "base/cancelable_callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_deque.h"
 
 namespace cc {
-struct RenderingStats;
 
 namespace internal {
 
 class WorkerPoolTask {
  public:
   virtual ~WorkerPoolTask();
 
   virtual bool IsCheap() = 0;
 
-  virtual void Run(RenderingStats* rendering_stats) = 0;
+  virtual void Run() = 0;
 
-  virtual void RunOnThread(
-      RenderingStats* rendering_stats, unsigned thread_index) = 0;
+  virtual void RunOnThread(unsigned thread_index) = 0;
 
   void DidComplete();
 
  protected:
   WorkerPoolTask(const base::Closure& reply);
 
   const base::Closure reply_;
 };
 
 }  // namespace internal
 
 class CC_EXPORT WorkerPoolClient {
  public:
   virtual void DidFinishDispatchingWorkerPoolCompletionCallbacks() = 0;
 
  protected:
   virtual ~WorkerPoolClient() {}
 };
 
 // A worker thread pool that runs rendering tasks and guarantees completion
 // of all pending tasks at shutdown.
 class WorkerPool {
  public:
-  typedef base::Callback<void(RenderingStats*)> Callback;
+  typedef base::Callback<void()> Callback;
 
   virtual ~WorkerPool();
 
   static scoped_ptr<WorkerPool> Create(
       WorkerPoolClient* client,
       size_t num_threads,
       base::TimeDelta check_for_completed_tasks_delay,
       const std::string& thread_name_prefix) {
     return make_scoped_ptr(new WorkerPool(client,
                                           num_threads,
                                           check_for_completed_tasks_delay,
                                           thread_name_prefix));
   }
 
   // Tells the worker pool to shutdown and returns once all pending tasks have
   // completed.
   void Shutdown();
 
   // Posts |task| to worker pool. On completion, |reply|
   // is posted to the thread that called PostTaskAndReply().
   void PostTaskAndReply(const Callback& task, const base::Closure& reply);
 
   // Set time limit for running cheap tasks.
   void SetRunCheapTasksTimeLimit(base::TimeTicks run_cheap_tasks_time_limit);
 
-  // Toggle rendering stats collection.
-  void SetRecordRenderingStats(bool record_rendering_stats);
-
-  // Collect rendering stats of all completed tasks.
-  void GetRenderingStats(RenderingStats* stats);
-
  protected:
   WorkerPool(WorkerPoolClient* client,
              size_t num_threads,
              base::TimeDelta check_for_completed_tasks_delay,
              const std::string& thread_name_prefix);
 
   void PostTask(scoped_ptr<internal::WorkerPoolTask> task);
 
  private:
   class Inner;
@@ skipping 25 matching lines @@
 
   // Hide the gory details of the worker pool in |inner_|.
   const scoped_ptr<Inner> inner_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerPool);
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_WORKER_POOL_H_