Add a headless configuration to Mojo's native viewport service

mojo/services/native_viewport/platform_viewport_headless.cc

+// Copyright 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 "mojo/services/native_viewport/platform_viewport_headless.h"
+
+namespace mojo {
+
+PlatformViewportHeadless::PlatformViewportHeadless(Delegate* delegate)
+    : delegate_(delegate) {
+}
+
+PlatformViewportHeadless::~PlatformViewportHeadless() {
+}
+
+void PlatformViewportHeadless::Init(const gfx::Rect& bounds) {
+  bounds_ = bounds;
+}
+
+void PlatformViewportHeadless::Show() {
+}
+
+void PlatformViewportHeadless::Hide() {
+}
+
+void PlatformViewportHeadless::Close() {
+  delegate_->OnDestroyed();
+}
+
+gfx::Size PlatformViewportHeadless::GetSize() {
+  return bounds_.size();
+}
+
+void PlatformViewportHeadless::SetBounds(const gfx::Rect& bounds) {
+  bounds_ = bounds;
+  delegate_->OnBoundsChanged(bounds_);
+}
+
+void PlatformViewportHeadless::SetCapture() {
+}
+
+void PlatformViewportHeadless::ReleaseCapture() {
+}
+
+// static
+scoped_ptr<PlatformViewport> PlatformViewportHeadless::Create(
+    Delegate* delegate) {
+  return scoped_ptr<PlatformViewport>(
+      new PlatformViewportHeadless(delegate)).Pass();
+}
+
+}  // namespace mojo