Add support for setting password value gated on user's gesture in a page

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1784 matching lines @@
 
 bool WebViewImpl::hasVerticalScrollbar()
 {
     return mainFrameImpl()->frameView()->verticalScrollbar();
 }
 
 const WebInputEvent* WebViewImpl::m_currentInputEvent = 0;
 
 bool WebViewImpl::handleInputEvent(const WebInputEvent& inputEvent)
 {
+    if (WebInputEvent::isUserGestureEventType(inputEvent.type))
+        m_page->setUserGestureSeen();
+
     TRACE_EVENT0("input", "WebViewImpl::handleInputEvent");
     // If we've started a drag and drop operation, ignore input events until
     // we're done.
     if (m_doingDragAndDrop)
         return true;
 
     if (m_devToolsAgent && m_devToolsAgent->handleInputEvent(m_page.get(), inputEvent))
         return true;
 
     // Report the event to be NOT processed by WebKit, so that the browser can handle it appropriately.
@@ skipping 2193 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink