Remove some more OS_CHROMEOS from browser.

ash/accelerators/accelerator_controller.cc

 // 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.
 
 #include "ash/accelerators/accelerator_controller.h"
 
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/ash_switches.h"
 #include "ash/caps_lock_delegate.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 338 matching lines @@
         return volume_control_delegate_->HandleVolumeUp(accelerator);
       break;
     case FOCUS_LAUNCHER:
       if (shell->launcher())
         return shell->focus_cycler()->FocusWidget(shell->launcher()->widget());
       break;
     case FOCUS_TRAY:
       if (shell->tray())
         return shell->focus_cycler()->FocusWidget(shell->tray()->GetWidget());
       break;
+    case SHOW_KEYBOARD_OVERLAY:
+      ash::Shell::GetInstance()->delegate()->ShowKeyboardOverlay(this);
+      break;
     case SHOW_OAK:
       if (CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kAshEnableOak)) {
         oak::ShowOakWindow();
         return true;
       }
       break;
     case NEXT_IME:
       if (ime_control_delegate_.get())
         return ime_control_delegate_->HandleNextIme();
@@ skipping 128 matching lines @@
     // Then set this one as active.
     Shell::GetInstance()->launcher()->ActivateLauncherItem(found_index);
   }
 }
 
 bool AcceleratorController::CanHandleAccelerators() const {
   return true;
 }
 
 }  // namespace ash