Mouse press should focus on any types of form controls.

Source/core/dom/Node.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 391 matching lines @@
     virtual short tabIndex() const;
 
     // Whether this kind of node can receive focus by default. Most nodes are
     // not focusable but some elements, such as form controls and links, are.
     virtual bool supportsFocus() const;
     // Whether the node can actually be focused.
     virtual bool isFocusable() const;
     virtual bool isKeyboardFocusable(KeyboardEvent*) const;
     virtual bool isMouseFocusable() const;
     virtual Node* focusDelegate();
+    // This is called only when the node is focused.
+    virtual bool shouldHaveFocusAppearance() const;
 
     enum UserSelectAllTreatment {
         UserSelectAllDoesNotAffectEditability,
         UserSelectAllIsAlwaysNonEditable
     };
     bool isContentEditable(UserSelectAllTreatment = UserSelectAllDoesNotAffectEditability);
     bool isContentRichlyEditable();
 
     bool rendererIsEditable(EditableType editableType = ContentIsEditable, UserSelectAllTreatment treatment = UserSelectAllIsAlwaysNonEditable) const
     {
@@ skipping 465 matching lines @@
 
 } //namespace
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const WebCore::Node*);
 void showNodePath(const WebCore::Node*);
 #endif
 
 #endif