WebUI: Get rid of more references to DOMUI in the rest of the directories.

chrome/browser/notifications/balloon_host.cc

Index: chrome/browser/notifications/balloon_host.cc
diff --git a/chrome/browser/notifications/balloon_host.cc b/chrome/browser/notifications/balloon_host.cc
index c43f035fefe42d82044628ac767aae717a0c5636..228935fb462dba8000999d6760f60eb716d1c75a 100644
--- a/chrome/browser/notifications/balloon_host.cc
+++ b/chrome/browser/notifications/balloon_host.cc
@@ -221,9 +221,9 @@ void BalloonHost::Init() {
   initialized_ = true;
 }
 
-void BalloonHost::EnableDOMUI() {
+void BalloonHost::EnableWebUI() {
   DCHECK(render_view_host_ == NULL) <<
-      "EnableDOMUI has to be called before a renderer is created.";
+      "EnableWebUI has to be called before a renderer is created.";
   enable_dom_ui_ = true;
 }