Add GPU memory tab to the task manager.

content/public/common/gpu_memory_stats.h

Index: content/public/common/gpu_memory_stats.h
diff --git a/content/public/common/gpu_memory_stats.h b/content/public/common/gpu_memory_stats.h
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+// 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 CONTENT_PUBLIC_COMMON_GPU_MEMORY_STATS_H_
+#define CONTENT_PUBLIC_COMMON_GPU_MEMORY_STATS_H_
+
+// Provides access to the GPU information for the system
+// on which chrome is currently running.
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/process.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+struct CONTENT_EXPORT GPUVideoMemoryUsageStats {
+  GPUVideoMemoryUsageStats();
+  ~GPUVideoMemoryUsageStats();
+
+  struct CONTENT_EXPORT ProcessStats {
+    ProcessStats();
+    ~ProcessStats();
+
+    // The bytes of GPU resources accessible by this process
+    size_t video_memory;
+
+    // Set to true if this process' GPU resource count is inflated because
+    // it is counting other processes' resources (e.g, the GPU process has
+    // duplicate set to true because it is the aggregate of all processes)
+    bool has_duplicates;
+  };
+  typedef std::map<base::ProcessId, ProcessStats> ProcessMap;
+
+  // A map of processes to their GPU resource consumption
+  ProcessMap process_map;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_GPU_MEMORY_STATS_H_