Add new empty files for VideoCapturerTrackSource and VideoTrackSource to make Chrome compile when a…

webrtc/api/videotracksource.h

Index: webrtc/api/videotracksource.h
diff --git a/webrtc/base/objc/RTCSSLAdapter.h b/webrtc/api/videotracksource.h
similarity index 59%
copy from webrtc/base/objc/RTCSSLAdapter.h
copy to webrtc/api/videotracksource.h
index 34db8432c2ffe56640520b7a6f8d902d60ade3df..daa0a0e3574f14b9a7ea8a806b46752b5b07e378 100644
--- a/webrtc/base/objc/RTCSSLAdapter.h
+++ b/webrtc/api/videotracksource.h
@@ -1,4 +1,5 @@
 /*
+ /*
  *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
@@ -8,13 +9,10 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import <Foundation/Foundation.h>
+#ifndef WEBRTC_API_VIDEOTRACKSOURCE_H_
+#define WEBRTC_API_VIDEOTRACKSOURCE_H_
 
-#import "webrtc/base/objc/RTCMacros.h"
+// TODO(perkj): This file is added to prepare for splitting VideoSource
+// into two parts, VideoCapturerTrackSource that will inherit VideoTrackSource.
 
-/**
- * Initialize and clean up the SSL library. Failure is fatal. These call the
- * corresponding functions in webrtc/base/ssladapter.h.
- */
-RTC_EXPORT BOOL RTCInitializeSSL();
-RTC_EXPORT BOOL RTCCleanupSSL();
+#endif  //  WEBRTC_API_VIDEOTRACKSOURCE_H_