Make task manager memory data more efficient and meaningful.

chrome/browser/task_manager/task_manager.h

 // Copyright (c) 2012 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_H_
 #define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_H_
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/task_manager/resource_provider.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "content/public/common/gpu_memory_stats.h"
 #include "third_party/WebKit/public/web/WebCache.h"
 
 class PrefRegistrySimple;
+class PrivateWorkingSetSnapshot;
 class TaskManagerModel;
 class TaskManagerModelGpuDataManagerObserver;
 
 namespace base {
 class ProcessMetrics;
 }
 
 namespace content {
 class WebContents;
 }
@@ skipping 243 matching lines @@
 
   void Clear();  // Removes all items.
 
   // Sends OnModelChanged() to all observers to inform them of significant
   // changes to the model.
   void ModelChanged();
 
   // Updates the values for all rows.
   void Refresh();
 
+  // Do a bulk repopulation of the physical_memory data on platforms where that
+  // is faster.
+  void RefreshPhysicalMemoryFromWorkingSetSnapshot();
+
   void NotifyVideoMemoryUsageStats(
       const content::GPUVideoMemoryUsageStats& video_memory_usage_stats);
 
   void NotifyBytesRead(const net::URLRequest& request, int bytes_read);
 
   void RegisterOnDataReadyCallback(const base::Closure& callback);
 
   void NotifyDataReady();
 
  private:
@@ skipping 225 matching lines @@
   // Whether the IO thread is currently in the process of updating; accessed
   // only on the IO thread.
   bool is_updating_byte_count_;
 
   // Buffer for coalescing BytesReadParam so we don't have to post a task on
   // each NotifyBytesRead() call.
   std::vector<BytesReadParam> bytes_read_buffer_;
 
   std::vector<base::Closure> on_data_ready_callbacks_;
 
+#if defined(OS_WIN)
+  scoped_ptr<PrivateWorkingSetSnapshot> working_set_snapshot_;
+#endif
+
   // All per-Resource values are stored here.
   mutable PerResourceCache per_resource_cache_;
 
   // All per-Process values are stored here.
   mutable PerProcessCache per_process_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerModel);
 };
 
 #endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_H_