ApplicationConnection lifetime management changes.

mojo/common/tracing_impl.h

Index: mojo/common/tracing_impl.h
diff --git a/mojo/common/tracing_impl.h b/mojo/common/tracing_impl.h
index d159b01538587806c43a2131a988ac693a410586..629914783326a48e2896e6c8eb31f59ab9d70946 100644
--- a/mojo/common/tracing_impl.h
+++ b/mojo/common/tracing_impl.h
@@ -6,6 +6,7 @@
 #define MOJO_COMMON_TRACING_IMPL_H_
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "mojo/application/public/cpp/interface_factory.h"
 #include "mojo/services/tracing/tracing.mojom.h"
 
@@ -27,6 +28,8 @@ class TracingImpl : public InterfaceFactory<tracing::TraceController> {
   void Create(ApplicationConnection* connection,
               InterfaceRequest<tracing::TraceController> request) override;
 
+  scoped_ptr<ApplicationConnection> connection_;
+
   DISALLOW_COPY_AND_ASSIGN(TracingImpl);
 };