Revert "Create direct write font proxy classes and unit tests."

content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.h

-// 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.
-
-#ifndef CONTENT_CHILD_DWRITE_FONT_PROXY_DWRITE_FONT_PROXY_INIT_WIN_H_
-#define CONTENT_CHILD_DWRITE_FONT_PROXY_DWRITE_FONT_PROXY_INIT_WIN_H_
-
-#include "base/callback.h"
-#include "content/common/content_export.h"
-#include "ipc/ipc_sender.h"
-
-namespace content {
-
-// Initializes the dwrite font proxy, using the specified callback to obtain
-// the sender to be used for sending IPC messages to the browser process.
-CONTENT_EXPORT void InitializeDWriteFontProxy(
-    const base::Callback<IPC::Sender*(void)>& sender);
-
-// Uninitialize the dwrite font proxy. This is safe to call even if the proxy
-// has not been initialized. After this, calls to load fonts may fail.
-CONTENT_EXPORT void UninitializeDWriteFontProxy();
-
-// Configures the dwrite font proxy to use the specified sender. This can be
-// useful in tests which use a fake render thread which is unable to process
-// font IPC messages. This should only be called when running as a test.
-CONTENT_EXPORT void SetDWriteFontProxySenderForTesting(IPC::Sender* sender);
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_DWRITE_FONT_PROXY_DWRITE_FONT_PROXY_INIT_WIN_H_