Support for tracing app initialization.

examples/trace_me/trace_me_app.cc

Index: examples/trace_me/trace_me_app.cc
diff --git a/examples/trace_me/trace_me_app.cc b/examples/trace_me/trace_me_app.cc
index 3132ad89bebb4bedaeb38317a5efad2d54599567..972232db95a2277abb7e9cc18915abfe6d63d2ef 100644
--- a/examples/trace_me/trace_me_app.cc
+++ b/examples/trace_me/trace_me_app.cc
@@ -52,12 +52,12 @@ class TraceMeApp : public mojo::ApplicationDelegate {
 
   // mojo:ApplicationDelegate:
   void Initialize(mojo::ApplicationImpl* app) override {
-    TRACE_EVENT0("trace_me", "TraceMeApp::Initialize");
-
     // Allow TracingImpl to connect to the central tracing service, advertising
     // its ability to provide trace events.
     tracing_.Initialize(app);
 
+    TRACE_EVENT0("trace_me", "TraceMeApp::Initialize");
+
     base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(&DoWork));
   }