Proof-reading comments in mojo/runner.

mojo/runner/shell_test_base.cc

Index: mojo/runner/shell_test_base.cc
diff --git a/mojo/runner/shell_test_base.cc b/mojo/runner/shell_test_base.cc
index f58780f0226988198589905b2620215677c7331f..81f2db0105d3809a2d276611edbca2417e4fca8d 100644
--- a/mojo/runner/shell_test_base.cc
+++ b/mojo/runner/shell_test_base.cc
@@ -62,7 +62,7 @@ ScopedMessagePipeHandle ShellTestBase::ConnectToService(
 void ShellTestBase::SetUpTestApplications() {
   // Set the URLResolver origin to be the same as the base file path for
   // local files. This is primarily for test convenience, so that references
-  // to unknown mojo: urls that do not have specific local file or custom
+  // to unknown mojo: URLs that do not have specific local file or custom
   // mappings registered on the URL resolver are treated as shared libraries.
   base::FilePath service_dir;
   CHECK(PathService::Get(base::DIR_MODULE, &service_dir));