chrome: Use base::MessageLoop. (Part 3)

This CL updates chrome/browser/* other than chrome/browser/ui which is in
another CL.

BUG=236029
TBR=brettw

Review URL: https://chromiumcodereview.appspot.com/14113053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202664 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/internal_auth_unittest.cc b/chrome/browser/internal_auth_unittest.cc
index da8954e..143b151c 100644
--- a/chrome/browser/internal_auth_unittest.cc
+++ b/chrome/browser/internal_auth_unittest.cc
@@ -28,7 +28,7 @@
   virtual void TearDown() {
   }
 
-  MessageLoop message_loop_;
+  base::MessageLoop message_loop_;
   std::string long_string_;
 };