Remove config.h inclusion from third_party/WebKit/Source/core/.

third_party/WebKit/Source/core/testing/CoreTestPrinters.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 "core/dom/Document.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
 #include "core/html/HTMLElement.h"
 #include "wtf/text/StringBuilder.h"
 #include <ios>
 #include <ostream> // NOLINT
 
 namespace blink {
 
@@ skipping 70 matching lines @@
 {
     return printPosition(ostream, position);
 }
 
 std::ostream& operator<<(std::ostream& ostream, const PositionInComposedTree& position)
 {
     return printPosition(ostream, position);
 }
 
 } // namespace blink