Nix GetRootWindowController, use RootWindowController::ForWindow.

chrome/browser/chromeos/accessibility/chromevox_panel.cc

 // Copyright 2015 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 "chrome/browser/chromeos/accessibility/chromevox_panel.h"
 
 #include "ash/accessibility_types.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf.h"
@@ skipping 172 matching lines @@
   UpdateWidgetBounds();
 }
 
 void ChromeVoxPanel::UpdateWidgetBounds() {
   gfx::Rect bounds(GetRootWindow()->bounds().size());
   if (!panel_fullscreen_)
     bounds.set_height(kPanelHeight);
 
   // If we're in full-screen mode, give the panel a height of 0 unless
   // it's active.
-  if (ash::GetRootWindowController(GetRootWindow())
+  if (ash::RootWindowController::ForWindow(GetRootWindow())
           ->GetWindowForFullscreenMode() &&
       !widget_->IsActive()) {
     bounds.set_height(0);
   }
 
   widget_->SetBounds(bounds);
 }
 
 void ChromeVoxPanel::SendPanelHeightToAsh(int panel_height) {
   // TODO(mash): Replace with shelf mojo API.
   ash::Shelf* shelf = ash::Shelf::ForWindow(GetRootWindow());
   ash::ShelfLayoutManager* shelf_layout_manager =
       shelf ? shelf->shelf_layout_manager() : nullptr;
   if (shelf_layout_manager)
     shelf_layout_manager->SetChromeVoxPanelHeight(panel_height);
 }