Revert r115276, it broke PanelDownloadTest.Download in interactive_ui_tests

chrome/browser/ui/cocoa/notifications/balloon_controller.mm

Index: chrome/browser/ui/cocoa/notifications/balloon_controller.mm
diff --git a/chrome/browser/ui/cocoa/notifications/balloon_controller.mm b/chrome/browser/ui/cocoa/notifications/balloon_controller.mm
index d60c92dc70467049b4cb39fdf4017fba4454ad2d..54ac79131c2bb52d50cdc0a80cf1c727d2fb41b9 100644
--- a/chrome/browser/ui/cocoa/notifications/balloon_controller.mm
+++ b/chrome/browser/ui/cocoa/notifications/balloon_controller.mm
@@ -176,7 +176,7 @@ const int kRightMargin = 2;
 - (void)updateContents {
   DCHECK(htmlContents_.get()) << "BalloonView::Update called before Show";
   if (htmlContents_->tab_contents()) {
-    htmlContents_->tab_contents()->GetController().LoadURL(
+    htmlContents_->tab_contents()->controller().LoadURL(
         balloon_->notification().content_url(), content::Referrer(),
         content::PAGE_TRANSITION_LINK, std::string());
   }