EventSender: Allow modifiers to be set for wheel events

content/shell/renderer/test_runner/EventSender.cpp

 // Copyright 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.
 
 // This file contains the definition for EventSender.
 //
 // Some notes about drag and drop handling:
 // Windows drag and drop goes through a system call to doDragDrop. At that
 // point, program control is given to Windows which then periodically makes
 // callbacks into the webview. This won't work for layout tests, so instead,
@@ skipping 1145 matching lines @@
     // Force a layout here just to make sure every position has been
     // determined before we send events (as well as all the other methods
     // that send an event do).
     if (shouldForceLayoutOnEvents())
         webview()->layout();
 
     int horizontal = arguments[0].toInt32();
     int vertical = arguments[1].toInt32();
     int paged = false;
     int hasPreciseScrollingDeltas = false;
+    int modifiers = 0;
 
     if (arguments.size() > 2 && arguments[2].isBool())
         paged = arguments[2].toBoolean();
 
     if (arguments.size() > 3 && arguments[3].isBool())
         hasPreciseScrollingDeltas = arguments[3].toBoolean();
 
-    initMouseEvent(WebInputEvent::MouseWheel, pressedButton, lastMousePos, event, getCurrentEventTimeSec(m_delegate), 0);
+    if (arguments.size() > 4 && (arguments[4].isObject() || arguments[4].isString()))
+        modifiers = getKeyModifiers(&(arguments[4]));
+
+    initMouseEvent(WebInputEvent::MouseWheel, pressedButton, lastMousePos, event, getCurrentEventTimeSec(m_delegate), modifiers);
     event->wheelTicksX = static_cast<float>(horizontal);
     event->wheelTicksY = static_cast<float>(vertical);
     event->deltaX = event->wheelTicksX;
     event->deltaY = event->wheelTicksY;
     event->scrollByPage = paged;
     event->hasPreciseScrollingDeltas = hasPreciseScrollingDeltas;
 
     if (continuous) {
         event->wheelTicksX /= scrollbarPixelsPerTick;
         event->wheelTicksY /= scrollbarPixelsPerTick;
@@ skipping 270 matching lines @@
 {
     result->setNull();
 }
 
 void EventSender::clearKillRing(const CppArgumentList&, CppVariant* result)
 {
     result->setNull();
 }
 
 }