mandoline: write this after lunch.

mash/wm/window_manager_application.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/wm/window_manager_application.h"
 
 #include "components/mus/common/util.h"
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_tree_connection.h"
 #include "components/mus/public/cpp/window_tree_host_factory.h"
 #include "mash/wm/background_layout.h"
 #include "mash/wm/shelf_layout.h"
 #include "mash/wm/window_layout.h"
 #include "mash/wm/window_manager_impl.h"
 #include "mojo/application/public/cpp/application_connection.h"
+#include "mojo/services/tracing/public/cpp/tracing_impl.h"
 #include "ui/mojo/init/ui_init.h"
 #include "ui/views/mus/aura_init.h"
 #include "ui/views/mus/display_converter.h"
 
 WindowManagerApplication::WindowManagerApplication()
     : root_(nullptr), window_count_(0), app_(nullptr) {}
 WindowManagerApplication::~WindowManagerApplication() {}
 
 mus::Window* WindowManagerApplication::GetWindowForContainer(
     mash::wm::mojom::Container container) {
   const mus::Id window_id = root_->connection()->GetConnectionId() << 16 |
                             static_cast<uint16_t>(container);
   return root_->GetChildById(window_id);
 }
 
 mus::Window* WindowManagerApplication::GetWindowById(mus::Id id) {
   return root_->GetChildById(id);
 }
 
 void WindowManagerApplication::Initialize(mojo::ApplicationImpl* app) {
   app_ = app;
+  tracing_.Initialize(app);
   mus::mojom::WindowManagerPtr window_manager;
   requests_.push_back(new mojo::InterfaceRequest<mus::mojom::WindowManager>(
       mojo::GetProxy(&window_manager)));
   mus::CreateSingleWindowTreeHost(app, this, &host_, window_manager.Pass(),
                                   this);
 }
 
 bool WindowManagerApplication::ConfigureIncomingConnection(
     mojo::ApplicationConnection* connection) {
   connection->AddService(this);
@@ skipping 68 matching lines @@
        container < static_cast<uint16_t>(mash::wm::mojom::CONTAINER_COUNT);
        ++container) {
     mus::Window* window = root_->connection()->NewWindow();
     DCHECK_EQ(mus::LoWord(window->id()), container)
         << "Containers must be created before other windows!";
     window->SetBounds(root_->bounds());
     window->SetVisible(true);
     root_->AddChild(window);
   }
 }