Create task_manager namespace and wrap classes related to TaskManager with it.

chrome/browser/task_manager/task_manager_render_resource.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 CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_RENDER_RESOURCE_H_
-#define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_RENDER_RESOURCE_H_
-
-#include "base/basictypes.h"
-#include "chrome/browser/task_manager/task_manager.h"
-#include "content/public/browser/render_view_host_observer.h"
-
-namespace content {
-class RenderViewHost;
-}
-
-// Base class for various types of render process resources that provides common
-// functionality like stats tracking.
-class TaskManagerRendererResource : public TaskManager::Resource,
-                                    public content::RenderViewHostObserver {
- public:
-  TaskManagerRendererResource(base::ProcessHandle process,
-                              content::RenderViewHost* render_view_host);
-  virtual ~TaskManagerRendererResource();
-
-  // TaskManager::Resource methods:
-  virtual base::ProcessHandle GetProcess() const OVERRIDE;
-  virtual int GetUniqueChildProcessId() const OVERRIDE;
-  virtual Type GetType() const OVERRIDE;
-  virtual int GetRoutingID() const OVERRIDE;
-
-  virtual bool ReportsCacheStats() const OVERRIDE;
-  virtual WebKit::WebCache::ResourceTypeStats GetWebCoreCacheStats() const
-      OVERRIDE;
-  virtual bool ReportsFPS() const OVERRIDE;
-  virtual float GetFPS() const OVERRIDE;
-  virtual bool ReportsV8MemoryStats() const OVERRIDE;
-  virtual size_t GetV8MemoryAllocated() const OVERRIDE;
-  virtual size_t GetV8MemoryUsed() const OVERRIDE;
-
-  // RenderResources are always inspectable.
-  virtual bool CanInspect() const OVERRIDE;
-  virtual void Inspect() const OVERRIDE;
-
-  // RenderResources always provide the network usage.
-  virtual bool SupportNetworkUsage() const OVERRIDE;
-  virtual void SetSupportNetworkUsage() OVERRIDE { }
-
-  virtual void Refresh() OVERRIDE;
-
-  virtual void NotifyResourceTypeStats(
-      const WebKit::WebCache::ResourceTypeStats& stats) OVERRIDE;
-
-  virtual void NotifyFPS(float fps) OVERRIDE;
-
-  virtual void NotifyV8HeapStats(size_t v8_memory_allocated,
-                                 size_t v8_memory_used) OVERRIDE;
-
-  // content::RenderViewHostObserver implementation.
-  virtual void RenderViewHostDestroyed(
-      content::RenderViewHost* render_view_host) OVERRIDE;
-
-  content::RenderViewHost* render_view_host() const {
-    return render_view_host_;
-  }
-
- private:
-  base::ProcessHandle process_;
-  int pid_;
-  int unique_process_id_;
-
-  // RenderViewHost we use to fetch stats.
-  content::RenderViewHost* render_view_host_;
-  // The stats_ field holds information about resource usage in the renderer
-  // process and so it is updated asynchronously by the Refresh() call.
-  WebKit::WebCache::ResourceTypeStats stats_;
-  // This flag is true if we are waiting for the renderer to report its stats.
-  bool pending_stats_update_;
-
-  // The fps_ field holds the renderer frames per second.
-  float fps_;
-  // This flag is true if we are waiting for the renderer to report its FPS.
-  bool pending_fps_update_;
-
-  // We do a similar dance to gather the V8 memory usage in a process.
-  size_t v8_memory_allocated_;
-  size_t v8_memory_used_;
-  bool pending_v8_memory_allocated_update_;
-
-  DISALLOW_COPY_AND_ASSIGN(TaskManagerRendererResource);
-};
-
-#endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_RENDER_RESOURCE_H_