De-client tracing.TraceController interface

sky/viewer/viewer.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 "base/files/file_path.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/common/tracing_impl.h"
 #include "mojo/icu/icu.h"
@@ skipping 20 matching lines @@
 
  private:
   // Overridden from ApplicationDelegate:
   virtual void Initialize(mojo::ApplicationImpl* app) override {
     RuntimeFlags::Initialize(app);
 
     platform_impl_.reset(new PlatformImpl(app));
     blink::initialize(platform_impl_.get());
 
     mojo::icu::Initialize(app);
-    mojo::TracingImpl::Create(app);
+    tracing_.Initialize(app);
   }
 
   virtual bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override {
     connection->AddService<mojo::ContentHandler>(this);
     return true;
   }
 
   // Overridden from InterfaceFactory<ContentHandler>
   virtual void Create(mojo::ApplicationConnection* connection,
                       mojo::InterfaceRequest<mojo::ContentHandler> request) override {
     mojo::BindToRequest(new ContentHandlerImpl(), &request);
   }
 
   scoped_ptr<PlatformImpl> platform_impl_;
+  mojo::TracingImpl tracing_;
 
   DISALLOW_COPY_AND_ASSIGN(Viewer);
 };
 
-}  // namespace mojo
+}  // namespace sky
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new sky::Viewer);
   return runner.Run(shell_handle);
 }