Task manager should support Idle Wakeups on Windows

chrome/browser/task_management/sampling/task_manager_impl.h

 // Copyright 2015 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 CHROME_BROWSER_TASK_MANAGEMENT_SAMPLING_TASK_MANAGER_IMPL_H_
 #define CHROME_BROWSER_TASK_MANAGEMENT_SAMPLING_TASK_MANAGER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
+#include <memory>
+#include <string>
+#include <vector>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/task_management/providers/task_provider.h"
 #include "chrome/browser/task_management/providers/task_provider_observer.h"
 #include "chrome/browser/task_management/sampling/task_group.h"
 #include "chrome/browser/task_management/sampling/task_manager_io_thread_helper.h"
 #include "chrome/browser/task_management/task_manager_interface.h"
 #include "content/public/browser/gpu_data_manager_observer.h"
 #include "gpu/ipc/common/memory_stats.h"
 
 namespace task_management {
 
+class SharedSampler;
+
 // Defines a concrete implementation of the TaskManagerInterface.
 class TaskManagerImpl :
     public TaskManagerInterface,
     public TaskProviderObserver,
     content::GpuDataManagerObserver {
  public:
   ~TaskManagerImpl() override;
 
   static TaskManagerImpl* GetInstance();
 
@@ skipping 104 matching lines @@
   ScopedVector<TaskProvider> task_providers_;
 
   // The current GPU memory usage stats that was last received from the
   // GpuDataManager.
   gpu::VideoMemoryUsageStats gpu_memory_stats_;
 
   // The specific blocking pool SequencedTaskRunner that will be used to make
   // sure TaskGroupSampler posts their refreshes serially.
   scoped_refptr<base::SequencedTaskRunner> blocking_pool_runner_;
 
+  // A special sampler shared with all instances of TaskGroup that calculates a
+  // subset of resources for all processes at once.
+  scoped_refptr<SharedSampler> shared_sampler_;
+
   // This will be set to true while there are observers and the task manager is
   // running.
   bool is_running_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerImpl);
 };
 
 }  // namespace task_management
 
 #endif  // CHROME_BROWSER_TASK_MANAGEMENT_SAMPLING_TASK_MANAGER_IMPL_H_