Allow zoom-in to a target rect when tapping multiple targets.

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 196 matching lines @@
     // window space.
     virtual void scrollFocusedNodeIntoRect(const WebRect&) { }
 
     // Advance the focus of the WebView forward to the next element or to the
     // previous element in the tab sequence (if reverse is true).
     virtual void advanceFocus(bool reverse) { }
 
     // Animate a scale into the specified find-in-page rect.
     virtual void zoomToFindInPageRect(const WebRect&) = 0;
 
+    // Animate a scale into the specified rect where multiple targets were
+    // found from previous tap gesture.
+    // Returns false if it doesn't do any zooming.
+    virtual bool zoomToMultipleTargetsRect(const WebRect&) = 0;
+
 
     // Zoom ----------------------------------------------------------------
 
     // Returns the current zoom level.  0 is "original size", and each increment
     // above or below represents zooming 20% larger or smaller to default limits
     // of 300% and 50% of original size, respectively.  Only plugins use
     // non whole-numbers, since they might choose to have specific zoom level so
     // that fixed-width content is fit-to-page-width, for example.
     virtual double zoomLevel() = 0;
 
@@ skipping 291 matching lines @@
 
     // Testing functionality for TestRunner ---------------------------------
 
 protected:
     ~WebView() {}
 };
 
 } // namespace WebKit
 
 #endif