Replaces |shell_handle| with |application_request| as the name of the parameter to MojoMain().

services/tracing/main.cc

Index: services/tracing/main.cc
diff --git a/services/tracing/main.cc b/services/tracing/main.cc
index c0f9b87cad36281c19925bf42071dd730876a4e4..0d12a755f2add3d8c372ead56f1048ce04d84eda 100644
--- a/services/tracing/main.cc
+++ b/services/tracing/main.cc
@@ -110,7 +110,7 @@ class TracingApp : public mojo::ApplicationDelegate,
 
 }  // namespace tracing
 
-MojoResult MojoMain(MojoHandle shell_handle) {
+MojoResult MojoMain(MojoHandle application_request) {
   mojo::ApplicationRunnerChromium runner(new tracing::TracingApp);
-  return runner.Run(shell_handle);
+  return runner.Run(application_request);
 }