Revert of Remove InputMethodEventHandler.

ash/host/ash_window_tree_host_x11.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 "ash/host/ash_window_tree_host_x11.h"
 
 #include <X11/extensions/Xfixes.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "ash/host/ash_window_tree_host_init_params.h"
 #include "ash/host/ash_window_tree_host_unified.h"
 #include "ash/host/root_window_transformer.h"
+#include "ash/ime/input_method_event_handler.h"
 #include "base/sys_info.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/display/screen.h"
 #include "ui/display/types/display_constants.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/events/devices/x11/device_list_cache_x11.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"
@@ skipping 177 matching lines @@
       return true;
   }
 }
 
 void AshWindowTreeHostX11::TranslateAndDispatchLocatedEvent(
     ui::LocatedEvent* event) {
   TranslateLocatedEvent(event);
   SendEventToSink(event);
 }
 
+ui::EventDispatchDetails AshWindowTreeHostX11::DispatchKeyEventPostIME(
+    ui::KeyEvent* event) {
+  input_method_handler()->SetPostIME(true);
+  ui::EventDispatchDetails details = event_sink()->OnEventFromSource(event);
+  if (!details.dispatcher_destroyed)
+    input_method_handler()->SetPostIME(false);
+  return details;
+}
+
 void AshWindowTreeHostX11::SetCrOSTapPaused(bool state) {
   if (!ui::IsXInput2Available())
     return;
   // Temporarily pause tap-to-click when the cursor is hidden.
   Atom prop = atom_cache()->GetAtom("Tap Paused");
   unsigned char value = state;
   const XIDeviceList& dev_list =
       ui::DeviceListCacheX11::GetInstance()->GetXI2DeviceList(xdisplay());
 
   // Only slave pointer devices could possibly have tap-paused property.
   for (int i = 0; i < dev_list.count; i++) {
     if (dev_list[i].use == XISlavePointer) {
       Atom old_type;
       int old_format;
       unsigned long old_nvalues, bytes;
       unsigned char* data;
       int result = XIGetProperty(xdisplay(), dev_list[i].deviceid, prop, 0, 0,
                                  False, AnyPropertyType, &old_type, &old_format,
                                  &old_nvalues, &bytes, &data);
       if (result != Success)
         continue;
       XFree(data);
       XIChangeProperty(xdisplay(), dev_list[i].deviceid, prop, XA_INTEGER, 8,
                        PropModeReplace, &value, 1);
     }
   }
 }
 
 }  // namespace ash