Introduce InputMethodAuraAndroid for Aura on Android

ui/base/ime/input_method_android.cc

+// Copyright 2015 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/base/ime/input_method_android.h"
+
+#include "ui/base/ime/text_input_client.h"
+#include "ui/events/event.h"
+
+// TODO(bshe): This is currently very similar to InputMethodMUS. Consider unify
+// them in the furture if the two have reasonable similarity.
+
+namespace ui {
+
+////////////////////////////////////////////////////////////////////////////////
+// InputMethodAndroid, public:
+
+InputMethodAndroid::InputMethodAndroid(
+    internal::InputMethodDelegate* delegate) {
+  SetDelegate(delegate);
+}
+
+InputMethodAndroid::~InputMethodAndroid() {}
+
+bool InputMethodAndroid::OnUntranslatedIMEMessage(
+    const base::NativeEvent& event,
+    NativeEventResult* result) {
+  return false;
+}
+
+void InputMethodAndroid::DispatchKeyEvent(ui::KeyEvent* event) {
+  DCHECK(event->type() == ui::ET_KEY_PRESSED ||
+         event->type() == ui::ET_KEY_RELEASED);
+
+  // If no text input client, do nothing.
+  if (!GetTextInputClient()) {
+    ignore_result(DispatchKeyEventPostIME(event));
+    return;
+  }
+
+  ignore_result(DispatchKeyEventPostIME(event));
+}
+
+void InputMethodAndroid::OnCaretBoundsChanged(
+    const ui::TextInputClient* client) {
+}
+
+void InputMethodAndroid::CancelComposition(
+    const ui::TextInputClient* client) {
+}
+
+void InputMethodAndroid::OnInputLocaleChanged() {}
+
+std::string InputMethodAndroid::GetInputLocale() {
+  return "";
+}
+
+bool InputMethodAndroid::IsCandidatePopupOpen() const {
+  return false;
+}
+
+}  // namespace ui