gpu:: Remove GpuDataManagerObserver::OnVideoMemoryUsageStatsUpdate().

chrome/browser/task_manager/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_MANAGER_SAMPLING_TASK_MANAGER_IMPL_H_
 #define CHROME_BROWSER_TASK_MANAGER_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/weak_ptr.h"
 #include "base/sequenced_task_runner.h"
 #include "base/time/time.h"
 #include "chrome/browser/task_manager/providers/task_provider.h"
 #include "chrome/browser/task_manager/providers/task_provider_observer.h"
 #include "chrome/browser/task_manager/sampling/task_group.h"
 #include "chrome/browser/task_manager/sampling/task_manager_io_thread_helper.h"
 #include "chrome/browser/task_manager/task_manager_interface.h"
-#include "content/public/browser/gpu_data_manager_observer.h"
 #include "gpu/ipc/common/memory_stats.h"
 
 namespace task_manager {
 
 class SharedSampler;
 
 // Defines a concrete implementation of the TaskManagerInterface.
-class TaskManagerImpl :
-    public TaskManagerInterface,
-    public TaskProviderObserver,
-    content::GpuDataManagerObserver {
+class TaskManagerImpl : public TaskManagerInterface,
+                        public TaskProviderObserver {
  public:
   ~TaskManagerImpl() override;
 
   static TaskManagerImpl* GetInstance();
 
   // task_manager::TaskManagerInterface:
   void ActivateTask(TaskId task_id) override;
   bool IsTaskKillable(TaskId task_id) override;
   void KillTask(TaskId task_id) override;
   double GetCpuUsage(TaskId task_id) const override;
@@ skipping 42 matching lines @@
   TaskIdList GetIdsOfTasksSharingSameProcess(TaskId task_id) const override;
   size_t GetNumberOfTasksOnSameProcess(TaskId task_id) const override;
   TaskId GetTaskIdForWebContents(
       content::WebContents* web_contents) const override;
 
   // task_manager::TaskProviderObserver:
   void TaskAdded(Task* task) override;
   void TaskRemoved(Task* task) override;
   void TaskUnresponsive(Task* task) override;
 
-  // content::GpuDataManagerObserver:
-  void OnVideoMemoryUsageStatsUpdate(
-      const gpu::VideoMemoryUsageStats& gpu_memory_stats) override;
-
   // The notification method on the UI thread when multiple bytes are read
   // from URLRequests. This will be called by the |io_thread_helper_|
   static void OnMultipleBytesReadUI(std::vector<BytesReadParam>* params);
 
  private:
   friend struct base::LazyInstanceTraitsBase<TaskManagerImpl>;
 
   TaskManagerImpl();
 
+  void OnVideoMemoryUsageStatsUpdate(
+      const gpu::VideoMemoryUsageStats& gpu_memory_stats);
+
   // task_manager::TaskManagerInterface:
   void Refresh() override;
   void StartUpdating() override;
   void StopUpdating() override;
 
   // Lookup a task by its pid, child_id and possibly route_id.
   Task* GetTaskByPidOrRoute(int pid, int child_id, int route_id) const;
 
   // Based on |param| the appropriate task will be updated by its network usage.
   // Returns true if it was able to match |param| to an existing task, returns
@@ skipping 40 matching lines @@
   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_;
 
+  base::WeakPtrFactory<TaskManagerImpl> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(TaskManagerImpl);
 };
 
 }  // namespace task_manager
 
 #endif  // CHROME_BROWSER_TASK_MANAGER_SAMPLING_TASK_MANAGER_IMPL_H_