Revert of Remove InputMethodEventHandler.

ash/shell.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 "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 23 matching lines @@
 #include "ash/display/screen_orientation_controller_chromeos.h"
 #include "ash/display/screen_position_controller.h"
 #include "ash/display/shutdown_observer_chromeos.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/drag_drop/drag_drop_controller.h"
 #include "ash/first_run/first_run_helper_impl.h"
 #include "ash/focus_cycler.h"
 #include "ash/frame/custom_frame_view_ash.h"
 #include "ash/gpu_support.h"
 #include "ash/high_contrast/high_contrast_controller.h"
+#include "ash/ime/input_method_event_handler.h"
 #include "ash/keyboard/keyboard_ui.h"
 #include "ash/laser/laser_pointer_controller.h"
 #include "ash/login_status.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
 #include "ash/media_controller.h"
 #include "ash/new_window_controller.h"
 #include "ash/palette_delegate.h"
 #include "ash/public/cpp/config.h"
 #include "ash/public/cpp/shell_window_ids.h"
@@ skipping 559 matching lines @@
   shell_delegate_->PreShutdown();
 
   // Remove the focus from any window. This will prevent overhead and side
   // effects (e.g. crashes) from changing focus during shutdown.
   // See bug crbug.com/134502.
   aura::client::GetFocusClient(GetPrimaryRootWindow())->FocusWindow(nullptr);
 
   // Please keep in same order as in Init() because it's easy to miss one.
   if (window_modality_controller_)
     window_modality_controller_.reset();
+  if (config != Config::MASH) {
+    RemovePreTargetHandler(
+        window_tree_host_manager_->input_method_event_handler());
+  }
 
   RemovePreTargetHandler(magnifier_key_scroll_handler_.get());
   magnifier_key_scroll_handler_.reset();
 
   RemovePreTargetHandler(speech_feedback_handler_.get());
   speech_feedback_handler_.reset();
 
   RemovePreTargetHandler(overlay_filter_.get());
   overlay_filter_.reset();
 
@@ skipping 310 matching lines @@
   }
 
   if (cursor_manager_) {
     cursor_manager_->SetDisplay(
         display::Screen::GetScreen()->GetPrimaryDisplay());
   }
 
   accelerator_controller_ = shell_port_->CreateAcceleratorController();
   maximize_mode_controller_ = base::MakeUnique<MaximizeModeController>();
 
+  if (!ShouldUseIMEService()) {
+    // Not applicable when using IME service as events are already routed to
+    // InputMethod first.
+    AddPreTargetHandler(
+        window_tree_host_manager_->input_method_event_handler());
+  }
+
   magnifier_key_scroll_handler_ = MagnifierKeyScroller::CreateHandler();
   AddPreTargetHandler(magnifier_key_scroll_handler_.get());
   speech_feedback_handler_ = SpokenFeedbackToggler::CreateHandler();
   AddPreTargetHandler(speech_feedback_handler_.get());
 
   // The order in which event filters are added is significant.
 
   // ui::UserActivityDetector passes events to observers, so let them get
   // rewritten first.
   user_activity_detector_.reset(new ui::UserActivityDetector);
@@ skipping 289 matching lines @@
 void Shell::OnPrefServiceInitialized(
     std::unique_ptr<::PrefService> pref_service) {
   if (!instance_)
     return;
   // |pref_service_| is null if can't connect to Chrome (as happens when
   // running mash outside of chrome --mash and chrome isn't built).
   pref_service_ = std::move(pref_service);
 }
 
 }  // namespace ash