Delete NetworkingContext and its subclasses.

Source/core/loader/FrameNetworkingContext.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 FrameNetworkingContext_h
-#define FrameNetworkingContext_h
-
-#include "core/dom/Document.h"
-#include "core/page/Frame.h"
-#include "weborigin/ReferrerPolicy.h"
-#include "core/platform/network/NetworkingContext.h"
-
-namespace WebCore {
-
-class FrameNetworkingContext : public NetworkingContext {
-public:
-    void invalidate()
-    {
-        m_frame = 0;
-    }
-
-    virtual bool shouldClearReferrerOnHTTPSToHTTPRedirect() const
-    {
-        return m_frame->document()->referrerPolicy() == ReferrerPolicyDefault;
-    }
-
-protected:
-    explicit FrameNetworkingContext(Frame* frame)
-        : m_frame(frame)
-    {
-    }
-
-    Frame* frame() const { return m_frame; }
-
-private:
-    virtual bool isValid() const OVERRIDE { return m_frame; }
-
-    Frame* m_frame;
-};
-
-}
-
-#endif // FrameNetworkingContext_h