Rename observer and clarify documentation.

BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/22799028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@219235 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index f02f54d..7d999ec 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1155,7 +1155,7 @@
 
 void WebContentsImpl::Stop() {
   render_manager_.Stop();
-  FOR_EACH_OBSERVER(WebContentsObserver, observers_, StopNavigation());
+  FOR_EACH_OBSERVER(WebContentsObserver, observers_, NavigationStopped());
 }
 
 WebContents* WebContentsImpl::Clone() {