Moves ownership of MenuItemView to MenuRunner as well as responbility

chrome/browser/chromeos/status/memory_menu_button.h

Index: chrome/browser/chromeos/status/memory_menu_button.h
diff --git a/chrome/browser/chromeos/status/memory_menu_button.h b/chrome/browser/chromeos/status/memory_menu_button.h
index 7e2c83aa6c01a05563883e1f2c9e7d1b756cdf3e..2802c2690109193c00e195f628430b992001596f 100644
--- a/chrome/browser/chromeos/status/memory_menu_button.h
+++ b/chrome/browser/chromeos/status/memory_menu_button.h
@@ -20,6 +20,7 @@ struct SystemMemoryInfoKB;
 
 namespace views {
 class MenuItemView;
+class MenuRunner;
 }
 
 namespace chromeos {
@@ -58,18 +59,14 @@ class MemoryMenuButton : public StatusAreaButton,
   // Execute command id for each renderer. Used for heap profiling.
   void SendCommandToRenderers(int id);
 
-  // Create and initialize menu if not already present.
-  void EnsureMenu();
+  // Creates and returns the menu. The caller owns the returned value.
+  views::MenuItemView* CreateMenu();
 
   // Updates text and schedules the timer to fire at the next minute interval.
   void UpdateTextAndSetNextTimer();
 
   base::OneShotTimer<MemoryMenuButton> timer_;
 
-  // NOTE: we use a scoped_ptr here as menu calls into 'this' from the
-  // constructor.
-  scoped_ptr<views::MenuItemView> menu_;
-
   // Raw data from /proc/meminfo
   scoped_ptr<base::SystemMemoryInfoKB> meminfo_;