Revert of Followup comments from r460581.

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

Index: third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
index effbefbb46f186b7f95c195705259317585868d5..572c4e7c1e01476aa58d200e8b3e5e3cb613e8c5 100644
--- a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
@@ -1440,10 +1440,6 @@ void LocalDOMWindow::AddedEventListener(
     AddUnloadEventListener(this);
   } else if (event_type == EventTypeNames::beforeunload) {
     UseCounter::Count(document(), UseCounter::kDocumentBeforeUnloadRegistered);
-    // This is confusingly named. It doesn't actually add the listener. It
-    // just increments a count so that we know we have listeners registered
-    // for the purposes of determining if we can fast terminate the renderer
-    // process.
     AddBeforeUnloadEventListener(this);
     if (GetFrame() && !GetFrame()->IsMainFrame())
       UseCounter::Count(document(),