Add tracing service and make the shell+sky_viewer+services talk to it

mojo/shell/context.cc

 // Copyright 2013 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 "mojo/shell/context.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/strings/string_split.h"
 #include "build/build_config.h"
 #include "mojo/application_manager/application_loader.h"
 #include "mojo/application_manager/application_manager.h"
 #include "mojo/application_manager/background_shell_application_loader.h"
+#include "mojo/common/tracing_impl.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/embedder/simple_platform_support.h"
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/shell/dynamic_application_loader.h"
 #include "mojo/shell/external_application_listener.h"
 #include "mojo/shell/in_process_dynamic_service_runner.h"
 #include "mojo/shell/out_of_process_dynamic_service_runner.h"
 #include "mojo/shell/switches.h"
 #include "mojo/shell/ui_application_loader_android.h"
 #include "mojo/spy/spy.h"
+#include "services/tracing/tracing.mojom.h"
+#include "url/gurl.h"
 
 #if defined(OS_ANDROID)
 #include "mojo/services/gles2/gpu_impl.h"
 #include "mojo/services/native_viewport/native_viewport_impl.h"
 #include "mojo/shell/android/android_handler_loader.h"
 #include "mojo/shell/network_application_loader.h"
 #endif  // defined(OS_ANDROID)
 
 namespace mojo {
 namespace shell {
@@ skipping 221 matching lines @@
   {
     scoped_ptr<BackgroundShellApplicationLoader> loader(
         new BackgroundShellApplicationLoader(
             scoped_ptr<ApplicationLoader>(new AndroidHandlerLoader()),
             "android_handler", base::MessageLoop::TYPE_DEFAULT));
     application_manager_.SetLoaderForURL(loader.Pass(),
                                          GURL("mojo:android_handler"));
   }
 #endif
 
+  tracing::TraceDataCollectorPtr trace_data_collector_ptr;
+  application_manager_.ConnectToService(GURL("mojo:tracing"),
+                                        &trace_data_collector_ptr);
+  TracingImpl::Create(trace_data_collector_ptr.Pass());
+
   if (listener_)
     listener_->WaitForListening();
 
   return true;
 }
 
 void Context::OnApplicationError(const GURL& url) {
   if (app_urls_.find(url) != app_urls_.end()) {
     app_urls_.erase(url);
     if (app_urls_.empty() && base::MessageLoop::current()->is_running())
@@ skipping 17 matching lines @@
 ScopedMessagePipeHandle Context::ConnectToServiceByName(
     const GURL& application_url,
     const std::string& service_name) {
   app_urls_.insert(application_url);
   return application_manager_.ConnectToServiceByName(
       application_url, service_name).Pass();
 }
 
 }  // namespace shell
 }  // namespace mojo