aura: Fix IME interaction in content-shell in chromeos build.

ui/aura/test/input_method_glue.cc

Index: ui/aura/test/input_method_glue.cc
diff --git a/ui/aura/test/input_method_glue.cc b/ui/aura/test/input_method_glue.cc
new file mode 100644
index 0000000000000000000000000000000000000000..10d0f647b75e685b609e1b2965db66443e267844
--- /dev/null
+++ b/ui/aura/test/input_method_glue.cc
@@ -0,0 +1,37 @@
+// Copyright 2016 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/aura/test/input_method_glue.h"
+
+#include "ui/aura/env.h"
+#include "ui/aura/window_tree_host.h"
+#include "ui/base/ime/input_method.h"
+#include "ui/events/event.h"
+
+namespace aura {
+
+InputMethodGlue::InputMethodGlue(aura::WindowTreeHost* host) : host_(host) {
+  aura::Env::GetInstance()->AddPreTargetHandler(this);
+  host_->GetInputMethod()->SetDelegate(this);
+}
+
+InputMethodGlue::~InputMethodGlue() {
+  host_->GetInputMethod()->SetDelegate(host_);
+  aura::Env::GetInstance()->RemovePreTargetHandler(this);
+}
+
+void InputMethodGlue::OnKeyEvent(ui::KeyEvent* key) {
+  if (processing_ime_event_)
+    return;
+  host_->GetInputMethod()->DispatchKeyEvent(key);
+  key->StopPropagation();
+}
+
+ui::EventDispatchDetails InputMethodGlue::DispatchKeyEventPostIME(
+    ui::KeyEvent* key) {
+  base::AutoReset<bool> reset(&processing_ime_event_, true);
+  return host_->DispatchKeyEventPostIME(key);
+}
+
+}  // namespace aura