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 5850dec41efab4442f5f23a91cc14fa86dfcd0cc..7ca33ee01a67061b3b2dc24615c1a4a2451138b1 100644
--- a/sky/viewer/viewer.cc
+++ b/sky/viewer/viewer.cc
@@ -38,7 +38,7 @@ class Viewer : public mojo::ApplicationDelegate,
     blink::initialize(platform_impl_.get());
 
     mojo::icu::Initialize(app);
-    mojo::TracingImpl::Create(app);
+    tracing_.Initialize(app);
   }
 
   virtual bool ConfigureIncomingConnection(
@@ -54,11 +54,12 @@ 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);