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

public/web/WebView.h

 /*
  * Copyright (C) 2009, 2010, 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 301 matching lines @@
     // Performs the specified plugin action on the node at the given location.
     virtual void performPluginAction(
         const WebPluginAction&, const WebPoint& location) = 0;
 
 
     // Data exchange -------------------------------------------------------
 
     // Do a hit test at given point and return the HitTestResult.
     virtual WebHitTestResult hitTestResultAt(const WebPoint&) = 0;
 
+    // Do a hit test equivalent to what would be done for a GestureTap event
+    // that has width/height corresponding to the supplied |tapArea|.
+    virtual WebHitTestResult hitTestResultForTap(const WebPoint& tapPoint,
+        const WebSize& tapArea) = 0;
+
     // Copy to the clipboard the image located at a particular point in the
     // WebView (if there is such an image)
     virtual void copyImageAt(const WebPoint&) = 0;
 
     // Save as the image located at a particular point in the
     // WebView (if there is such an image)
     virtual void saveImageAt(const WebPoint&) = 0;
 
     // Notifies the WebView that a drag has terminated.
     virtual void dragSourceEndedAt(
@@ skipping 156 matching lines @@
 
     // Testing functionality for TestRunner ---------------------------------
 
 protected:
     ~WebView() {}
 };
 
 } // namespace blink
 
 #endif