Cleanup ash shelf accessor functions.

ash/root_window_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/root_window_controller.h"
 
 #include <queue>
 #include <vector>
 
 #include "ash/ash_constants.h"
@@ skipping 256 matching lines @@
   controller->Init(RootWindowController::PRIMARY,
                    Shell::GetInstance()->delegate()->IsFirstRunAfterBoot());
 }
 
 void RootWindowController::CreateForSecondaryDisplay(AshWindowTreeHost* host) {
   RootWindowController* controller = new RootWindowController(host);
   controller->Init(RootWindowController::SECONDARY, false /* first run */);
 }
 
 // static
-RootWindowController* RootWindowController::ForShelf(
-    const aura::Window* window) {
-  CHECK(Shell::HasInstance());
-  return GetRootWindowController(window->GetRootWindow());
-}
-
-// static
 RootWindowController* RootWindowController::ForWindow(
     const aura::Window* window) {
   CHECK(Shell::HasInstance());
   return GetRootWindowController(window->GetRootWindow());
 }
 
 // static
 RootWindowController* RootWindowController::ForTargetRootWindow() {
   CHECK(Shell::HasInstance());
   return GetRootWindowController(Shell::GetTargetRootWindow());
@@ skipping 762 matching lines @@
   else
     DisableTouchHudProjection();
 }
 
 RootWindowController* GetRootWindowController(
     const aura::Window* root_window) {
   return root_window ? GetRootWindowSettings(root_window)->controller : NULL;
 }
 
 }  // namespace ash