Revert "Update includes for webrtc/{base => rtc_base} rename (2/3)"

webrtc/call/rsid_resolution_observer.h

 /*
  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #ifndef WEBRTC_CALL_RSID_RESOLUTION_OBSERVER_H_
 #define WEBRTC_CALL_RSID_RESOLUTION_OBSERVER_H_
 
 #include <string>
 
-#include "webrtc/rtc_base/basictypes.h"
+#include "webrtc/base/basictypes.h"
 
 namespace webrtc {
 
 // One RSID can be associated with one, and only one, SSRC, throughout a call.
 // The resolution might either happen during call setup, or during the call.
 class RsidResolutionObserver {
  public:
   virtual ~RsidResolutionObserver() = default;
 
   virtual void OnRsidResolved(const std::string& rsid, uint32_t ssrc) = 0;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_CALL_RSID_RESOLUTION_OBSERVER_H_