Enable Config::MUS to use classic IME instead of servicified IME.

ash/mus/bridge/shell_port_mash.cc

 // Copyright 2016 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/mus/bridge/shell_port_mash.h"
 
 #include <utility>
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_controller_delegate_aura.h"
@@ skipping 471 matching lines @@
   if (mirrored_display.is_valid()) {
     display_params->display =
         base::MakeUnique<display::Display>(mirrored_display);
   }
   // TODO: wire update is_primary_display correctly.
   display_params->is_primary_display = true;
   aura::WindowTreeHostMusInitParams aura_init_params =
       window_manager_->window_manager_client()->CreateInitParamsForNewDisplay();
   aura_init_params.display_id = init_params.display_id;
   aura_init_params.display_init_params = std::move(display_params);
+  aura_init_params.use_classic_ime = true;
   return base::MakeUnique<AshWindowTreeHostMus>(std::move(aura_init_params));
 }
 
 void ShellPortMash::OnCreatedRootWindowContainers(
     RootWindowController* root_window_controller) {
   // TODO: To avoid lots of IPC AddActivationParent() should take an array.
   // http://crbug.com/682048.
   aura::Window* root_window = root_window_controller->GetRootWindow();
   for (size_t i = 0; i < kNumActivatableShellWindowIds; ++i) {
     window_manager_->window_manager_client()->AddActivationParent(
@@ skipping 61 matching lines @@
   mash_state_->accelerator_controller_registrar =
       base ::MakeUnique<AcceleratorControllerRegistrar>(
           window_manager_, accelerator_namespace_id);
   return base::MakeUnique<AcceleratorController>(
       mash_state_->accelerator_controller_delegate.get(),
       mash_state_->accelerator_controller_registrar.get());
 }
 
 }  // namespace mus
 }  // namespace ash