mandoline: write this after lunch.

mandoline/ui/desktop_ui/browser_manager.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 "mandoline/ui/desktop_ui/browser_manager.h"
 
 #include "base/command_line.h"
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_observer.h"
 #include "mandoline/ui/desktop_ui/browser_window.h"
@@ skipping 31 matching lines @@
 
 void BrowserManager::LaunchURL(const mojo::String& url) {
   DCHECK(!browsers_.empty());
   // TODO(fsamuel): Create a new Browser once we support multiple browser
   // windows.
   (*browsers_.begin())->LoadURL(GURL(url));
 }
 
 void BrowserManager::Initialize(mojo::ApplicationImpl* app) {
   app_ = app;
+  tracing_.Initialize(app);
 
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = "mojo:mus";
   app_->ConnectToService(request.Pass(), &host_factory_);
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   // Create a Browser for each valid URL in the command line.
   for (const auto& arg : command_line->GetArgs()) {
     GURL url(arg);
     if (url.is_valid())
@@ skipping 10 matching lines @@
   connection->AddService<LaunchHandler>(this);
   return true;
 }
 
 void BrowserManager::Create(mojo::ApplicationConnection* connection,
                             mojo::InterfaceRequest<LaunchHandler> request) {
   launch_handler_bindings_.AddBinding(this, request.Pass());
 }
 
 }  // namespace mandoline