Prepare to use generated shim headers for FLAC

flac.h

Index: flac.h
===================================================================
--- flac.h	(revision 174038)
+++ flac.h	(working copy)
@@ -1,18 +0,0 @@
-// Copyright (c) 2011 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 THIRD_PARTY_FLAC_FLAC_H_
-#define THIRD_PARTY_FLAC_FLAC_H_
-#pragma once
-
-// This is a shim header to include the right flac headers.
-// Use this instead of referencing the flac headers directly.
-
-#if defined(USE_SYSTEM_FLAC)
-#include <FLAC/stream_encoder.h>
-#else
-#include "third_party/flac/include/FLAC/stream_encoder.h"
-#endif
-
-#endif  // THIRD_PARTY_FLAC_FLAC_H_