Remove config.h inclusion from third_party/WebKit/Source/modules/[a-i]*/.

third_party/WebKit/Source/modules/canvas2d/MouseEventHitRegion.cpp

 // Copyright 2015 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 "config.h"
 #include "modules/canvas2d/MouseEventHitRegion.h"
 
 #include "core/events/MouseEvent.h"
 #include "core/html/HTMLCanvasElement.h"
 
 namespace blink {
 
 String MouseEventHitRegion::region(MouseEvent& event)
 {
     if (!event.target() || !isHTMLCanvasElement(event.target()->toNode()))
         return String();
 
     HTMLCanvasElement* canvas = toHTMLCanvasElement(event.target()->toNode());
     return regionIdFromAbsoluteLocation(*canvas, event.absoluteLocation());
 }
 
 } // namespace blink