Add GPU memory tab to the task manager.

chrome/browser/ui/gtk/task_manager_gtk.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_UI_GTK_TASK_MANAGER_GTK_H_
 #define CHROME_BROWSER_UI_GTK_TASK_MANAGER_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
@@ skipping 167 matching lines @@
         CompareImpl(model, a, b, IDS_TASK_MANAGER_WEBCORE_SCRIPTS_CACHE_COLUMN);
   }
 
   // WebCore CSS Cache sorting callback.
   static gint CompareWebCoreCssCache(GtkTreeModel* model, GtkTreeIter* a,
                                      GtkTreeIter* b, gpointer task_manager) {
     return reinterpret_cast<TaskManagerGtk*>(task_manager)->
         CompareImpl(model, a, b, IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN);
   }
 
+  // Vidmem sorting callback.
+  static gint CompareVidmem(GtkTreeModel* model, GtkTreeIter* a,
+                            GtkTreeIter* b, gpointer task_manager) {
+    return reinterpret_cast<TaskManagerGtk*>(task_manager)->
+        CompareImpl(model, a, b, IDS_TASK_MANAGER_VIDMEM_COLUMN);
+  }
+
   // FPS sorting callback.
   static gint CompareFPS(GtkTreeModel* model, GtkTreeIter* a,
                          GtkTreeIter* b, gpointer task_manager) {
     return reinterpret_cast<TaskManagerGtk*>(task_manager)->
         CompareImpl(model, a, b, IDS_TASK_MANAGER_FPS_COLUMN);
   }
 
   // Sqlite memory sorting callback.
   static gint CompareSqliteMemoryUsed(GtkTreeModel* model, GtkTreeIter* a,
                                       GtkTreeIter* b, gpointer task_manager) {
@@ skipping 44 matching lines @@
   // ourselves caused.
   bool ignore_selection_changed_;
 
   // If true, background resources are rendered with a yellow highlight.
   bool highlight_background_resources_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_TASK_MANAGER_GTK_H_