Add rudimentary mash shelf functionality.

mash/system_ui/system_ui.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 "mash/system_ui/system_ui.h"
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "components/mus/public/cpp/property_type_converters.h"
-#include "mash/wm/public/interfaces/container.mojom.h"
-#include "mojo/shell/public/cpp/application_connection.h"
-#include "mojo/shell/public/cpp/application_impl.h"
-#include "ui/gfx/canvas.h"
-#include "ui/views/mus/aura_init.h"
-#include "ui/views/mus/native_widget_mus.h"
-#include "ui/views/mus/window_manager_connection.h"
-#include "ui/views/widget/widget_delegate.h"
-
-namespace mash {
-namespace system_ui {
-namespace {
-
-class Shelf : public views::WidgetDelegateView {
- public:
-  static void Create(mojo::Shell* shell) {
-    views::Widget* widget = new views::Widget;
-    views::Widget::InitParams params(
-        views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
-    params.delegate = new Shelf;
-
-    std::map<std::string, std::vector<uint8_t>> properties;
-    properties[mash::wm::mojom::kWindowContainer_Property] =
-        mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
-            mash::wm::mojom::CONTAINER_USER_SHELF);
-    mus::Window* window =
-        views::WindowManagerConnection::Get()->NewWindow(properties);
-    params.native_widget = new views::NativeWidgetMus(
-        widget, shell, window, mus::mojom::SURFACE_TYPE_DEFAULT);
-    widget->Init(params);
-    widget->Show();
-  }
-
- private:
-  Shelf() {}
-  ~Shelf() override {}
-
-  // Overridden from views::View:
-  void OnPaint(gfx::Canvas* canvas) override {
-    canvas->FillRect(GetLocalBounds(), SK_ColorYELLOW);
-  }
-  gfx::Size GetPreferredSize() const override { return gfx::Size(1, 48); }
-
-  // Overridden from views::WidgetDelegate:
-  views::View* GetContentsView() override { return this; }
-
-  DISALLOW_COPY_AND_ASSIGN(Shelf);
-};
-
-}  // namespace
-
-SystemUI::SystemUI() {}
-
-SystemUI::~SystemUI() {
-}
-
-void SystemUI::Initialize(mojo::ApplicationImpl* app) {
-  tracing_.Initialize(app);
-
-  aura_init_.reset(new views::AuraInit(app, "views_mus_resources.pak"));
-  views::WindowManagerConnection::Create(app);
-
-  Shelf::Create(app->shell());
-}
-
-bool SystemUI::ConfigureIncomingConnection(
-    mojo::ApplicationConnection* connection) {
-  return true;
-}
-
-}  // namespace system_ui
-}  // namespace mash