Revert of Remove InputMethodEventHandler.

ui/aura/window_event_dispatcher.cc

Index: ui/aura/window_event_dispatcher.cc
diff --git a/ui/aura/window_event_dispatcher.cc b/ui/aura/window_event_dispatcher.cc
index dc286d0826545413afb7ddb91314056bf84d439d..589529ea6c0889e70fdec7f5694377455cf2d70a 100644
--- a/ui/aura/window_event_dispatcher.cc
+++ b/ui/aura/window_event_dispatcher.cc
@@ -25,7 +25,6 @@
 #include "ui/aura/window_tracker.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/hit_test.h"
-#include "ui/base/ime/input_method.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
@@ -93,7 +92,6 @@
       dispatching_held_event_(nullptr),
       observer_manager_(this),
       event_targeter_(new WindowTargeter),
-      skip_ime_(false),
       repost_event_factory_(this),
       held_event_factory_(this) {
   ui::GestureRecognizer::Get()->AddGestureEventHelper(this);
@@ -521,8 +519,6 @@
     details = PreDispatchLocatedEvent(target_window, event->AsScrollEvent());
   } else if (event->IsTouchEvent()) {
     details = PreDispatchTouchEvent(target_window, event->AsTouchEvent());
-  } else if (event->IsKeyEvent()) {
-    details = PreDispatchKeyEvent(event->AsKeyEvent());
   }
   if (details.dispatcher_destroyed || details.target_destroyed)
     return details;
@@ -933,14 +929,4 @@
   return PreDispatchLocatedEvent(target, event);
 }
 
-ui::EventDispatchDetails WindowEventDispatcher::PreDispatchKeyEvent(
-    ui::KeyEvent* event) {
-  if (skip_ime_ || !host_->has_input_method() ||
-      (event->flags() & ui::EF_IS_SYNTHESIZED))
-    return ui::EventDispatchDetails();
-  host_->GetInputMethod()->DispatchKeyEvent(event);
-  event->StopPropagation();
-  return ui::EventDispatchDetails();
-}
-
 }  // namespace aura