Refactoring the ownership of ui::InputMethod.

chrome/browser/ui/ash/ash_keyboard_controller_proxy.cc

Index: chrome/browser/ui/ash/ash_keyboard_controller_proxy.cc
diff --git a/chrome/browser/ui/ash/ash_keyboard_controller_proxy.cc b/chrome/browser/ui/ash/ash_keyboard_controller_proxy.cc
index 0b792444a3fa4d5dc38c59a37624375362c87387..636608a3623cede89d9f9d239aa67cc06846ef18 100644
--- a/chrome/browser/ui/ash/ash_keyboard_controller_proxy.cc
+++ b/chrome/browser/ui/ash/ash_keyboard_controller_proxy.cc
@@ -24,6 +24,7 @@
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
+#include "ui/aura/window_tree_host.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
@@ -125,9 +126,9 @@ void AshKeyboardControllerProxy::OnRequest(
 }
 
 ui::InputMethod* AshKeyboardControllerProxy::GetInputMethod() {
-  aura::Window* root_window = ash::Shell::GetInstance()->GetPrimaryRootWindow();
+  aura::Window* root_window = ash::Shell::GetPrimaryRootWindow();
   DCHECK(root_window);
-  return root_window->GetProperty(aura::client::kRootWindowInputMethodKey);
+  return root_window->GetHost()->GetInputMethod();
 }
 
 void AshKeyboardControllerProxy::RequestAudioInput(