Revert of Remove InputMethodEventHandler.

ui/events/test/event_generator.cc

 // Copyright 2014 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 "ui/events/test/event_generator.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 670 matching lines @@
   if (async) {
     std::unique_ptr<ui::Event> pending_event = ui::Event::Clone(*event);
     if (pending_events_.empty()) {
       base::ThreadTaskRunnerHandle::Get()->PostTask(
           FROM_HERE,
           base::Bind(&EventGenerator::DispatchNextPendingEvent,
                      base::Unretained(this)));
     }
     pending_events_.push_back(std::move(pending_event));
   } else {
+    if (event->IsKeyEvent())
+      delegate()->DispatchKeyEventToIME(current_target_, event->AsKeyEvent());
     MaybeDispatchToPointerWatchers(*event);
     if (!event->handled()) {
       ui::EventSource* event_source =
           delegate()->GetEventSource(current_target_);
       ui::EventSourceTestApi event_source_test(event_source);
       ui::EventDispatchDetails details =
           event_source_test.SendEventToSink(event);
       CHECK(!details.dispatcher_destroyed);
     }
   }
@@ skipping 41 matching lines @@
   return default_delegate;
 }
 
 EventGeneratorDelegate* EventGenerator::delegate() {
   return const_cast<EventGeneratorDelegate*>(
       const_cast<const EventGenerator*>(this)->delegate());
 }
 
 }  // namespace test
 }  // namespace ui