Use FocusParams in FocusController::setFocusedElement and Document::setFocusedElement arguments.

third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp

 /*
  * Copyright (C) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 2367 matching lines @@
     return Traversal<HTMLLabelElement>::firstAncestorOrSelf(*node());
 }
 
 void AXNodeObject::setFocused(bool on)
 {
     if (!canSetFocusAttribute())
         return;
 
     Document* document = this->document();
     if (!on) {
-        document->setFocusedElement(nullptr);
+        document->clearFocusedElement();
     } else {
         Node* node = this->node();
         if (node && node->isElementNode()) {
             // If this node is already the currently focused node, then calling focus() won't do anything.
             // That is a problem when focus is removed from the webpage to chrome, and then returns.
             // In these cases, we need to do what keyboard and mouse focus do, which is reset focus first.
             if (document->focusedElement() == node)
-                document->setFocusedElement(nullptr);
+                document->clearFocusedElement();
 
             toElement(node)->focus();
         } else {
-            document->setFocusedElement(nullptr);
+            document->clearFocusedElement();
         }
     }
 }
 
 void AXNodeObject::increment()
 {
     UserGestureIndicator gestureIndicator(DefinitelyProcessingNewUserGesture);
     alterSliderValue(true);
 }
 
@@ skipping 700 matching lines @@
     return String();
 }
 
 DEFINE_TRACE(AXNodeObject)
 {
     visitor->trace(m_node);
     AXObject::trace(visitor);
 }
 
 } // namespace blin