[Ash] Introduces new IPC messages to support IME on Win-Ash

ui/metro_viewer/ime_types.cc

+// Copyright (c) 2013 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/metro_viewer/ime_types.h"
+
+namespace metro_viewer {
+
+UnderlineInfo::UnderlineInfo()
+    : start_offset(0),
+      end_offset(0),
+      thick(false) {
+}
+
+Composition::Composition()
+    : selection_start(0),
+      selection_end(0) {
+}
+
+Composition::~Composition() {
+}
+
+CharacterBounds::CharacterBounds()
+    : left(0),
+      top(0),
+      right(0),
+      bottom(0) {
+}
+
+}  // namespace metro_viewer