Canvas2d: Remove unnecessary conversion in EventHitRegion.

Source/modules/canvas2d/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 2221 matching lines @@
     if (m_hitRegionManager)
         m_hitRegionManager->removeHitRegionById(id);
 }
 
 void CanvasRenderingContext2D::clearHitRegions()
 {
     if (m_hitRegionManager)
         m_hitRegionManager->removeAllHitRegions();
 }
 
-HitRegion* CanvasRenderingContext2D::hitRegionAtPoint(const LayoutPoint& point)
+HitRegion* CanvasRenderingContext2D::hitRegionAtPoint(const FloatPoint& point)
 {
     if (m_hitRegionManager)
         return m_hitRegionManager->getHitRegionAtPoint(point);
 
     return nullptr;
 }
 
 unsigned CanvasRenderingContext2D::hitRegionsCount() const
 {
     if (m_hitRegionManager)
@@ skipping 63 matching lines @@
         if (imageType == CanvasRenderingContext2DState::NonOpaqueImage)
             return;
         if (alpha < 0xFF)
             return;
     }
 
     canvas()->buffer()->willOverwriteCanvas();
 }
 
 } // namespace blink