Scale the deltaX/deltaY on the mouse wheel events to be consistent with the compositor implementati…

third_party/WebKit/Source/web/WebInputEventConversion.cpp

 /*
  * Copyright (C) 2009 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 135 matching lines @@
         ASSERT_NOT_REACHED();
     }
 }
 
 // PlatformWheelEventBuilder --------------------------------------------------
 
 PlatformWheelEventBuilder::PlatformWheelEventBuilder(Widget* widget, const WebMouseWheelEvent& e)
 {
     m_position = widget->convertFromRootFrame(flooredIntPoint(convertHitPointToRootFrame(widget, FloatPoint(e.x, e.y))));
     m_globalPosition = IntPoint(e.globalX, e.globalY);
-    m_deltaX = e.deltaX;
-    m_deltaY = e.deltaY;
+    m_deltaX = scaleDeltaToWindow(widget, e.deltaX);
+    m_deltaY = scaleDeltaToWindow(widget, e.deltaY);
     m_wheelTicksX = e.wheelTicksX;
     m_wheelTicksY = e.wheelTicksY;
     m_granularity = e.scrollByPage ?
         ScrollByPageWheelEvent : ScrollByPixelWheelEvent;
 
     m_type = PlatformEvent::Wheel;
 
     m_timestamp = e.timeStampSeconds;
     m_modifiers = e.modifiers;
 
@@ skipping 577 matching lines @@
         break;
     case GestureSourceTouchscreen:
         sourceDevice = WebGestureDeviceTouchscreen;
         break;
     case GestureSourceUninitialized:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace blink