Fix up some style guide violations wrt aligning function arguments.

base/observer_list_threadsafe.h

Index: base/observer_list_threadsafe.h
diff --git a/base/observer_list_threadsafe.h b/base/observer_list_threadsafe.h
index ce30ce096860e2c34d6d74e3935bb28e02012f60..d0151f49ea92955ae067a121af90b92688ce3ac9 100644
--- a/base/observer_list_threadsafe.h
+++ b/base/observer_list_threadsafe.h
@@ -137,7 +137,8 @@ class ObserverListThreadSafe
     for (it = observer_lists_.begin(); it != observer_lists_.end(); ++it) {
       MessageLoop* loop = (*it).first;
       ObserverList<ObserverType>* list = (*it).second;
-      loop->PostTask(FROM_HERE,
+      loop->PostTask(
+          FROM_HERE,
           NewRunnableMethod(this,
               &ObserverListThreadSafe<ObserverType>::
                  template NotifyWrapper<Method, Params>, list, method));