Add GPU memory tab to the task manager.

chrome/browser/ui/cocoa/task_manager_mac.mm

Index: chrome/browser/ui/cocoa/task_manager_mac.mm
diff --git a/chrome/browser/ui/cocoa/task_manager_mac.mm b/chrome/browser/ui/cocoa/task_manager_mac.mm
index 3f622c166afa4af9b529929e74731778db0ac4dc..dcc571daeee9d487faad3d778285e71a5cddd796 100644
--- a/chrome/browser/ui/cocoa/task_manager_mac.mm
+++ b/chrome/browser/ui/cocoa/task_manager_mac.mm
@@ -54,6 +54,8 @@ const struct ColumnWidth {
       arraysize("2000.0K (2000.0 live)") * kCharWidth, -1 },
   { IDS_TASK_MANAGER_FPS_COLUMN,
       arraysize("100") * kCharWidth, -1 },
+  { IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN,
+      arraysize("2000.0K") * kCharWidth, -1 },
   { IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN,
       arraysize("800 kB") * kCharWidth, -1 },
   { IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN,
@@ -305,6 +307,7 @@ class SortHelper {
                 visible:NO];
   [self addColumnWithId:IDS_TASK_MANAGER_WEBCORE_CSS_CACHE_COLUMN visible:NO];
   [self addColumnWithId:IDS_TASK_MANAGER_FPS_COLUMN visible:YES];
+  [self addColumnWithId:IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN visible:NO];
   [self addColumnWithId:IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN visible:NO];
   [self addColumnWithId:IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN
                 visible:NO];
@@ -488,6 +491,9 @@ class SortHelper {
     case IDS_TASK_MANAGER_FPS_COLUMN:
       return base::SysUTF16ToNSString(model_->GetResourceFPS(row));
 
+    case IDS_TASK_MANAGER_VIDEO_MEMORY_COLUMN:
+      return base::SysUTF16ToNSString(model_->GetResourceVideoMemory(row));
+
     case IDS_TASK_MANAGER_SQLITE_MEMORY_USED_COLUMN:
       if (!model_->IsResourceFirstInGroup(row))
         return @"";