Move //mojo/services tracing & catalog to //services

mojo/services/tracing/public/cpp/tracing_impl.cc

-// Copyright 2014 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/services/tracing/public/cpp/tracing_impl.h"
-
-#include <utility>
-
-#include "base/lazy_instance.h"
-#include "base/synchronization/lock.h"
-#include "base/threading/platform_thread.h"
-#include "base/trace_event/trace_event_impl.h"
-#include "services/shell/public/cpp/connector.h"
-
-#ifdef NDEBUG
-#include "base/command_line.h"
-#include "mojo/services/tracing/public/cpp/switches.h"
-#endif
-
-namespace mojo {
-namespace {
-
-// Controls access to |g_tracing_singleton_created|, which can be accessed from
-// different threads.
-base::LazyInstance<base::Lock>::Leaky g_singleton_lock =
-    LAZY_INSTANCE_INITIALIZER;
-
-// Whether we are the first TracingImpl to be created in this mojo
-// application. The first TracingImpl in a physical mojo application connects
-// to the mojo:tracing service.
-//
-// If this is a ContentHandler, it will outlive all its served Applications. If
-// this is a raw mojo application, it is the only Application served.
-bool g_tracing_singleton_created = false;
-
-}
-
-TracingImpl::TracingImpl() {
-}
-
-TracingImpl::~TracingImpl() {
-}
-
-void TracingImpl::Initialize(Connector* connector, const std::string& url) {
-  {
-    base::AutoLock lock(g_singleton_lock.Get());
-    if (g_tracing_singleton_created)
-      return;
-    g_tracing_singleton_created = true;
-  }
-
-  // This will only set the name for the first app in a loaded mojo file. It's
-  // up to something like CoreServices to name its own child threads.
-  base::PlatformThread::SetName(url);
-
-  connection_ = connector->Connect("mojo:tracing");
-  connection_->AddInterface(this);
-
-#ifdef NDEBUG
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          tracing::kEarlyTracing)) {
-    provider_impl_.ForceEnableTracing();
-  }
-#else
-  provider_impl_.ForceEnableTracing();
-#endif
-}
-
-void TracingImpl::Create(Connection* connection,
-                         InterfaceRequest<tracing::TraceProvider> request) {
-  provider_impl_.Bind(std::move(request));
-}
-
-}  // namespace mojo