Remove PlatformMouseEvent::m_modifierFlags member.

Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 511 matching lines @@
 void ChromeClientImpl::deviceOrPageScaleFactorChanged() const
 {
     m_webView->deviceOrPageScaleFactorChanged();
 }
 
 void ChromeClientImpl::layoutUpdated(LocalFrame* frame) const
 {
     m_webView->layoutUpdated(WebLocalFrameImpl::fromFrame(frame));
 }
 
-void ChromeClientImpl::mouseDidMoveOverElement(
-    const HitTestResult& result, unsigned modifierFlags)
+void ChromeClientImpl::mouseDidMoveOverElement(const HitTestResult& result)
 {
     if (!m_webView->client())
         return;
 
     WebURL url;
     // Find out if the mouse is over a link, and if so, let our UI know...
     if (result.isLiveLink() && !result.absoluteLinkURL().string().isEmpty()) {
         url = result.absoluteLinkURL();
     } else if (result.innerNonSharedNode()
         && (isHTMLObjectElement(*result.innerNonSharedNode())
@@ skipping 330 matching lines @@
 }
 
 void ChromeClientImpl::textFieldDataListChanged(HTMLFormControlElement& element)
 {
     if (!m_webView->autofillClient())
         return;
     m_webView->autofillClient()->textFieldDidChange(WebFormControlElement(&element));
 }
 
 } // namespace blink