Mouse press should focus on any types of form controls.

Source/WebCore/html/HTMLSelectElement.h

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 94 matching lines @@
     // For use in the implementation of HTMLOptionElement.
     void optionSelectionStateChanged(HTMLOptionElement*, bool optionIsSelected);
 
 protected:
     HTMLSelectElement(const QualifiedName&, Document*, HTMLFormElement*);
 
 private:
     virtual const AtomicString& formControlType() const;
     
     virtual bool isKeyboardFocusable(KeyboardEvent*) const;
-    virtual bool isMouseFocusable() const;
 
     virtual void dispatchFocusEvent(PassRefPtr<Node> oldFocusedNode, FocusDirection) OVERRIDE;
     virtual void dispatchBlurEvent(PassRefPtr<Node> newFocusedNode);
     
     virtual bool canStartSelection() const { return false; }
 
     virtual bool isEnumeratable() const { return true; }
     virtual bool supportLabels() const OVERRIDE { return true; }
 
     virtual FormControlState saveFormControlState() const OVERRIDE;
@@ skipping 91 matching lines @@
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLSelectElement(node));
     return static_cast<const HTMLSelectElement*>(node);
 }
 
 void toHTMLSelectElement(const HTMLSelectElement*); // This overload will catch anyone doing an unnecessary cast.
 
 } // namespace
 
 #endif