Revert of Remove InputMethodEventHandler.

extensions/shell/browser/shell_desktop_controller_aura.h

Index: extensions/shell/browser/shell_desktop_controller_aura.h
diff --git a/extensions/shell/browser/shell_desktop_controller_aura.h b/extensions/shell/browser/shell_desktop_controller_aura.h
index 65506624fa20f79eccbb928a30cae06929e4c389..b16d4a31b3561a79f6c998c124b5e4d50ea26750 100644
--- a/extensions/shell/browser/shell_desktop_controller_aura.h
+++ b/extensions/shell/browser/shell_desktop_controller_aura.h
@@ -53,6 +53,7 @@
 namespace extensions {
 class AppWindowClient;
 class Extension;
+class InputMethodEventHandler;
 class ShellScreen;
 
 // Simple desktop controller for app_shell. Sets up a root Aura window for the
@@ -127,6 +128,8 @@
 
   std::unique_ptr<wm::CompoundEventFilter> root_window_event_filter_;
 
+  std::unique_ptr<InputMethodEventHandler> input_method_event_handler_;
+
   std::unique_ptr<aura::client::DefaultCaptureClient> capture_client_;
 
   std::unique_ptr<aura::client::FocusClient> focus_client_;