Add WebKit API for doing a hit-test that mimics GestureTap

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 4048 matching lines @@
 HitTestResult WebViewImpl::hitTestResultForWindowPos(const IntPoint& pos)
 {
     if (!m_page->mainFrame()->isLocalFrame())
         return HitTestResult();
     IntPoint docPoint(m_page->deprecatedLocalMainFrame()->view()->windowToContents(pos));
     HitTestResult result = m_page->deprecatedLocalMainFrame()->eventHandler().hitTestResultAtPoint(docPoint, HitTestRequest::ReadOnly | HitTestRequest::Active);
     result.setToShadowHostIfInUserAgentShadowRoot();
     return result;
 }
 
+WebHitTestResult WebViewImpl::hitTestResultForTap(const WebPoint& tapPointWindowPos, const WebSize& tapArea)
+{
+    if (!m_page->mainFrame()->isLocalFrame())
+        return HitTestResult();
+
+    WebGestureEvent tapEvent;
+    tapEvent.x = tapPointWindowPos.x;
+    tapEvent.y = tapPointWindowPos.y;
+    tapEvent.type = WebInputEvent::GestureTap;
+    tapEvent.data.tap.tapCount = 1;
+    tapEvent.data.tap.width = tapArea.width;
+    tapEvent.data.tap.height = tapArea.height;
+
+    PlatformGestureEventBuilder platformEvent(mainFrameImpl()->frameView(), tapEvent);
+
+    HitTestResult result = m_page->deprecatedLocalMainFrame()->eventHandler().hitTestResultForGestureEvent(platformEvent, HitTestRequest::ReadOnly | HitTestRequest::Active).hitTestResult();
+
+    result.setToShadowHostIfInUserAgentShadowRoot();
+    return result;
+}
+
 void WebViewImpl::setTabsToLinks(bool enable)
 {
     m_tabsToLinks = enable;
 }
 
 bool WebViewImpl::tabsToLinks() const
 {
     return m_tabsToLinks;
 }
 
@@ skipping 394 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