Use Widget frame and WidgetDelegate in ActvityWidget

athena/activity/activity_widget_delegate.cc

+// Copyright 2014 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 "athena/activity/activity_widget_delegate.h"
+
+#include "athena/activity/activity_frame_view.h"
+#include "athena/activity/public/activity_view_model.h"
+#include "ui/views/view.h"
+#include "ui/views/window/client_view.h"
+
+namespace athena {
+
+ActivityWidgetDelegate::ActivityWidgetDelegate(ActivityViewModel* view_model)
+    : view_model_(view_model) {
+}
+
+ActivityWidgetDelegate::~ActivityWidgetDelegate() {
+}
+
+base::string16 ActivityWidgetDelegate::GetWindowTitle() const {
+  return view_model_->GetTitle();
+}
+
+void ActivityWidgetDelegate::DeleteDelegate() {
+  delete this;
+}
+
+views::Widget* ActivityWidgetDelegate::GetWidget() {
+  return GetContentsView()->GetWidget();
+}
+
+const views::Widget* ActivityWidgetDelegate::GetWidget() const {
+  return const_cast<ActivityWidgetDelegate*>(this)->GetWidget();
+}
+
+views::View* ActivityWidgetDelegate::GetContentsView() {
+  return view_model_->GetContentsView();
+}
+
+views::ClientView* ActivityWidgetDelegate::CreateClientView(
+    views::Widget* widget) {
+  return new views::ClientView(widget, view_model_->GetContentsView());
+}
+
+views::NonClientFrameView* ActivityWidgetDelegate::CreateNonClientFrameView(
+    views::Widget* widget) {
+  return new ActivityFrameView(widget, view_model_);
+}
+
+}  // namespace athena