Style cleanup in preparation for auto-linting base/.

base/message_loop.cc

Index: base/message_loop.cc
diff --git a/base/message_loop.cc b/base/message_loop.cc
index 314a7a0d768b141caf8213dd98833291a7267937..dbe780a427cc5c46daabeb575bc9c556faf3cdd3 100644
--- a/base/message_loop.cc
+++ b/base/message_loop.cc
@@ -72,7 +72,7 @@ static LPTOP_LEVEL_EXCEPTION_FILTER GetTopSEHFilter() {
 MessageLoop* MessageLoop::current() {
   // TODO(darin): sadly, we cannot enable this yet since people call us even
   // when they have no intention of using us.
-  //DCHECK(loop) << "Ouch, did you forget to initialize me?";
+  // DCHECK(loop) << "Ouch, did you forget to initialize me?";
   return lazy_tls_ptr.Pointer()->Get();
 }