Cleanup: move WebRTC related files from chrome/browser/media to chrome/browser/media/webrtc/

chrome/browser/media/webrtc_log_util.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 CHROME_BROWSER_MEDIA_WEBRTC_LOG_UTIL_H_
-#define CHROME_BROWSER_MEDIA_WEBRTC_LOG_UTIL_H_
-
-#include "base/files/file_path.h"
-#include "base/time/time.h"
-
-class WebRtcLogUtil {
- public:
-  // Deletes logs files older that 5 days. Updates the log file list. Must be
-  // called on the FILE thread.
-  static void DeleteOldWebRtcLogFiles(const base::FilePath& log_dir);
-
-  // Deletes logs files older that 5 days and logs younger than
-  // |delete_begin_time|. Updates the log file list. If |delete_begin_time| is
-  // base::time::Max(), no recent logs will be deleted, and the function is
-  // equal to DeleteOldWebRtcLogFiles(). Must be called on the FILE thread.
-  static void DeleteOldAndRecentWebRtcLogFiles(
-      const base::FilePath& log_dir,
-      const base::Time& delete_begin_time);
-
-  // Calls DeleteOldWebRtcLogFiles() for all profiles. Must be called on the UI
-  // thread.
-  static void DeleteOldWebRtcLogFilesForAllProfiles();
-};
-
-#endif  // CHROME_BROWSER_MEDIA_WEBRTC_LOG_UTIL_H_