[chromedriver] Support clicking an element in sub frames.

chrome/test/chromedriver/window_commands.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/chromedriver/window_commands.h"
 
 #include <list>
 
 #include "base/callback.h"
 #include "base/string_number_conversions.h"
@@ skipping 324 matching lines @@
   if (has_element) {
     Status status = ScrollElementIntoView(
         session, web_view, element_id, &location);
     if (status.IsError())
       return status;
   } else {
     location = session->mouse_position;
   }
 
   if (has_offset) {
-    location.offset(x_offset, y_offset);
+    location.Offset(x_offset, y_offset);
   } else {
     WebSize size;
     Status status = GetElementSize(session, web_view, element_id, &size);
     if (status.IsError())
       return status;
-    location.offset(size.width / 2, size.height / 2);
+    location.Offset(size.width / 2, size.height / 2);
   }
 
   std::list<MouseEvent> events;
   events.push_back(
       MouseEvent(kMovedMouseEventType, kNoneMouseButton,
                  location.x, location.y, 0));
   Status status = web_view->DispatchMouseEvents(events);
   if (status.IsOk())
     session->mouse_position = location;
   return status;
@@ skipping 287 matching lines @@
     for (std::list<Cookie>::const_iterator it = cookies.begin();
          it != cookies.end(); ++it) {
       status = web_view->DeleteCookie(it->name, url);
       if (status.IsError())
         return status;
     }
   }
 
   return Status(kOk);
 }