| Index: ash/system/overview/overview_button_tray.h | 
| diff --git a/ash/system/overview/overview_button_tray.h b/ash/system/overview/overview_button_tray.h | 
| index a58bae11576457979207ee82e858ef9781a91a46..41683c6c29671c99311b64e48e4bac6d28871fbd 100644 | 
| --- a/ash/system/overview/overview_button_tray.h | 
| +++ b/ash/system/overview/overview_button_tray.h | 
| @@ -52,8 +52,9 @@ class ASH_EXPORT OverviewButtonTray : public TrayBackgroundView, | 
| // alignment of the shelf. | 
| void SetIconBorderForShelfAlignment(); | 
|  | 
| -  // Sets the icon to visible if maximize mode is enabled and | 
| -  // WindowSelectorController::CanSelect. | 
| +  // Shows or hides the overview button. The button should be shown when the | 
| +  // user is in maximize mode and is in an active desktop environment, otherwise | 
| +  // the button should be hidden. | 
| void UpdateIconVisibility(); | 
|  | 
| // Weak pointer, will be parented by TrayContainer for its lifetime. | 
|  |