Add GPU memory tab to the task manager.

chrome/browser/task_manager/task_manager.h

Index: chrome/browser/task_manager/task_manager.h
diff --git a/chrome/browser/task_manager/task_manager.h b/chrome/browser/task_manager/task_manager.h
index 117ac60bf79f9fb9060704af36a093d8b0b0e389..60a8ced74cf19d7c52840c91172f35d13ac518f7 100644
--- a/chrome/browser/task_manager/task_manager.h
+++ b/chrome/browser/task_manager/task_manager.h
@@ -18,6 +18,7 @@
 #include "base/string16.h"
 #include "base/timer.h"
 #include "chrome/browser/renderer_host/web_cache_manager.h"
+#include "content/public/common/gpu_info.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCache.h"
 
 class TaskManagerModel;
@@ -314,6 +315,7 @@ class TaskManagerModel : public base::RefCountedThreadSafe<TaskManagerModel> {
   string16 GetResourceWebCoreImageCacheSize(int index) const;
   string16 GetResourceWebCoreScriptsCacheSize(int index) const;
   string16 GetResourceWebCoreCSSCacheSize(int index) const;
+  string16 GetResourceVidmem(int index) const;
   string16 GetResourceFPS(int index) const;
   string16 GetResourceSqliteMemoryUsed(int index) const;
   string16 GetResourceGoatsTeleported(int index) const;
@@ -338,6 +340,9 @@ class TaskManagerModel : public base::RefCountedThreadSafe<TaskManagerModel> {
   bool GetWebCoreCacheStats(int index,
                             WebKit::WebCache::ResourceTypeStats* result) const;
 
+  // Gets the GPU memory allocated of the given page.
+  bool GetVidmem(int index, size_t* vidmem, bool* has_duplicates) const;
+
   // Gets the fps of the given page. Return false if the resource for the given
   // row isn't a renderer.
   bool GetFPS(int index, float* result) const;
@@ -439,6 +444,8 @@ class TaskManagerModel : public base::RefCountedThreadSafe<TaskManagerModel> {
                  int routing_id,
                  float fps);
 
+  void NotifyVidmem(const content::GPUVidmem& vidmem);
+
   void NotifyV8HeapStats(base::ProcessId renderer_id,
                          size_t v8_memory_allocated,
                          size_t v8_memory_used);
@@ -494,6 +501,8 @@ class TaskManagerModel : public base::RefCountedThreadSafe<TaskManagerModel> {
   // Updates the values for all rows.
   void Refresh();
 
+  void RefreshVidmem();
+
   void AddItem(TaskManager::Resource* resource, bool notify_table);
   void RemoveItem(TaskManager::Resource* resource);
 
@@ -558,6 +567,10 @@ class TaskManagerModel : public base::RefCountedThreadSafe<TaskManagerModel> {
   // A map that contains the CPU usage (in %) for a process since last refresh.
   CPUUsageMap cpu_usage_map_;
 
+  // A map that contains the video memory usage for a process
+  content::GPUVidmem vidmem_;
+  bool pending_vidmem_update_;
+
   // A map that contains the private/shared memory usage of the process. We
   // cache this because the same APIs are called on linux and windows, and
   // because the linux call takes >10ms to complete. This cache is cleared on