Nix GetRootWindowController, use RootWindowController::ForWindow.

chrome/browser/ui/ash/chrome_keyboard_ui.cc

 // Copyright (c) 2013 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/ui/ash/chrome_keyboard_ui.h"
 
 #include <utility>
 
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
@@ skipping 183 matching lines @@
 
 bool ChromeKeyboardUI::ShouldWindowOverscroll(aura::Window* window) const {
   aura::Window* root_window = window->GetRootWindow();
   if (!root_window)
     return true;
 
   if (root_window != GetKeyboardRootWindow())
     return false;
 
   ash::RootWindowController* root_window_controller =
-      ash::GetRootWindowController(root_window);
+      ash::RootWindowController::ForWindow(root_window);
   // Shell ime window container contains virtual keyboard windows and IME
   // windows(IME windows are created by chrome.app.window.create api). They
   // should never be overscrolled.
   return !root_window_controller
               ->GetContainer(ash::kShellWindowId_ImeWindowParentContainer)
               ->Contains(window);
 }
 
 void ChromeKeyboardUI::SetUpdateInputType(ui::TextInputType type) {
   // TODO(bshe): Need to check the affected window's profile once multi-profile
@@ skipping 14 matching lines @@
                                TextInputTypeToGeneratedInputTypeEnum(type)));
   event_args->Append(std::move(input_context));
 
   auto event = base::MakeUnique<extensions::Event>(
       extensions::events::VIRTUAL_KEYBOARD_PRIVATE_ON_TEXT_INPUT_BOX_FOCUSED,
       virtual_keyboard_private::OnTextInputBoxFocused::kEventName,
       std::move(event_args), browser_context());
   router->DispatchEventToExtension(kVirtualKeyboardExtensionID,
                                    std::move(event));
 }