Delete NetworkingContext and its subclasses.

Source/core/platform/network/NetworkingContext.h

-/*
-    Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
-
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Library General Public
-    License as published by the Free Software Foundation; either
-    version 2 of the License, or (at your option) any later version.
-
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Library General Public License for more details.
-
-    You should have received a copy of the GNU Library General Public License
-    along with this library; see the file COPYING.LIB.  If not, write to
-    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-    Boston, MA 02110-1301, USA.
-*/
-
-#ifndef NetworkingContext_h
-#define NetworkingContext_h
-
-#include <wtf/RefCounted.h>
-
-namespace WebKit {
-class WebCookieJar;
-}
-
-namespace WebCore {
-
-class NetworkingContext : public RefCounted<NetworkingContext> {
-public:
-    virtual ~NetworkingContext() { }
-
-    virtual bool isValid() const { return true; }
-    virtual bool shouldClearReferrerOnHTTPSToHTTPRedirect() const = 0;
-    virtual WebKit::WebCookieJar* cookieJar() const = 0;
-
-protected:
-    NetworkingContext() { }
-};
-
-}
-
-#endif // NetworkingContext_h