Move to using focusedElement instead of focusedNode

Move to focusedElement() as focusedNode is deprecated and will be removed soon..

BUG=258763
NOTRY=true

Review URL: https://codereview.chromium.org/184933002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255362 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/accessibility/renderer_accessibility_focus_only.cc

@@ -55,7 +55,7 @@ void RendererAccessibilityFocusOnly::DidFinishLoad(blink::WebFrame* frame) {
   // focus event. This is important so that if focus is initially in an
   // editable text field, Windows will know to pop up the keyboard if the
   // user touches it and focus doesn't change.
-  HandleFocusedNodeChanged(document.focusedNode(), false);
+  HandleFocusedNodeChanged(document.focusedElement(), false);
 }
 
 void RendererAccessibilityFocusOnly::HandleFocusedNodeChanged(