De-client tracing.TraceController interface

sky/viewer/viewer.cc

Index: sky/viewer/viewer.cc
diff --git a/sky/viewer/viewer.cc b/sky/viewer/viewer.cc
index 4c5dd74eb292dcbce3c546cbebbf0f1e8432948f..fefd6fcf48edb088f4861f82d9b54a8b9fe6452c 100644
--- a/sky/viewer/viewer.cc
+++ b/sky/viewer/viewer.cc
@@ -51,7 +51,7 @@ class Viewer : public mojo::ApplicationDelegate,
     blink::initialize(platform_impl_.get());
     base::i18n::InitializeICU();
 
-    mojo::TracingImpl::Create(app);
+    tracing_.Initialize(app);
   }
 
   virtual bool ConfigureIncomingConnection(
@@ -67,11 +67,12 @@ class Viewer : public mojo::ApplicationDelegate,
   }
 
   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);