Rename WebCore to blink in Modules

Source/modules/navigatorcontentutils/testing/InternalsNavigatorContentUtils.h

 // Copyright 2014 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.
 
 #ifndef InternalsNavigatorContentUtils_h
 #define InternalsNavigatorContentUtils_h
 
-namespace WebCore {
+namespace blink {
 
 class Document;
 class Internals;
 
 class InternalsNavigatorContentUtils {
 public:
     static void setNavigatorContentUtilsClientMock(Internals&, Document*);
 };
 
-} // namespace WebCore
+} // namespace blink
 
 #endif // InternalsNavigatorContentUtils_h