Minor clean-up in base/guid.*

BUG=None
[email protected]

Review URL: https://codereview.chromium.org/24767002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225681 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/guid.h b/base/guid.h
index 468b65f..2a4ed4c4 100644
--- a/base/guid.h
+++ b/base/guid.h
@@ -27,6 +27,6 @@
 BASE_EXPORT std::string RandomDataToGUIDString(const uint64 bytes[2]);
 #endif
 
-}  // namespace guid
+}  // namespace base
 
 #endif  // BASE_GUID_H_