Make keyboard controller a singleton.

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.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 "chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "chrome/browser/chrome_browser_main.h"
 #include "chrome/browser/ui/ash/ash_init.h"
 #include "chrome/browser/ui/ash/ash_util.h"
 #include "chrome/browser/ui/views/ash/tab_scrubber.h"
 #include "chrome/common/chrome_switches.h"
 #include "ui/aura/env.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/screen_type_delegate.h"
 #include "ui/keyboard/keyboard.h"
+#include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_util.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/ui/views/select_file_dialog_extension.h"
 #include "chrome/browser/ui/views/select_file_dialog_extension_factory.h"
 #endif
 
 #if !defined(OS_CHROMEOS)
 #include "ui/shell_dialogs/select_file_dialog.h"
 #include "ui/shell_dialogs/shell_dialogs_delegate.h"
@@ skipping 59 matching lines @@
   if (!ash::Shell::HasInstance())
     return;
 
   // Initialize TabScrubber after the Ash Shell has been initialized.
   TabScrubber::GetInstance();
   // Activate virtual keyboard after profile is initialized. It depends on the
   // default profile. If keyboard usability experiment flag is set, defer the
   // activation to UpdateWindow() in virtual_keyboard_window_controller.cc.
   if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
     ash::Shell::GetPrimaryRootWindowController()->ActivateKeyboard(
-        ash::Shell::GetInstance()->keyboard_controller());
+        keyboard::KeyboardController::GetInstance());
   }
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostMainMessageLoopRun() {
   chrome::CloseAsh();
 }