Wires up immersive mode for chrome and mash

ash/mus/frame/detached_title_area_renderer.cc

+// 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 "ash/mus/frame/detached_title_area_renderer.h"
+
+#include "ash/common/frame/header_view.h"
+#include "ash/mus/frame/detached_title_area_renderer_host.h"
+#include "services/ui/public/cpp/window.h"
+#include "ui/views/mus/native_widget_mus.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+namespace ash {
+namespace mus {
+
+DetachedTitleAreaRenderer::DetachedTitleAreaRenderer(
+    DetachedTitleAreaRendererHost* host,
+    views::Widget* frame,
+    ui::Window* window,
+    Source source)
+    : host_(host), frame_(frame), widget_(new views::Widget) {
+  views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
+  params.delegate = this;
+  params.name = "DetachedTitleAreaRenderer";

[James Cook, 2016/08/24 17:00:32]

Hooray for every widget having a name!

+  params.activatable = views::Widget::InitParams::ACTIVATABLE_NO;
+  params.native_widget = new views::NativeWidgetMus(
+      widget_, window, ui::mojom::SurfaceType::UNDERLAY);
+  widget_->Init(params);
+  HeaderView* header_view = new HeaderView(frame_);
+  if (source == Source::CLIENT) {
+    // HeaderView behaves differently when the widget it is associated with is
+    // fullscreen (HeaderView is normally the
+    // ImmersiveFullscreenControllerDelegate). Set this as when creating for
+    // the client HeaderView is not the ImmersiveFullscreenControllerDelegate.
+    header_view->set_is_immersive_delegate(false);
+  }
+  widget_->SetContentsView(header_view);
+  widget_->GetRootView()->SetSize(window->bounds().size());
+  widget_->ShowInactive();
+}
+
+void DetachedTitleAreaRenderer::Destroy() {
+  host_ = nullptr;
+  if (widget_)
+    widget_->CloseNow();
+}
+
+views::Widget* DetachedTitleAreaRenderer::GetWidget() {
+  return widget_;
+}
+
+const views::Widget* DetachedTitleAreaRenderer::GetWidget() const {
+  return widget_;
+}
+
+void DetachedTitleAreaRenderer::DeleteDelegate() {
+  if (host_)
+    host_->OnDetachedTitleAreaRendererDestroyed(this);
+  delete this;
+}
+
+DetachedTitleAreaRenderer::~DetachedTitleAreaRenderer() {}
+
+}  // namespace mus
+}  // namespace ash