Move webrtc/{base => rtc_base}

webrtc/rtc_base/java/src/org/webrtc/ThreadUtils.java

 /*
  *  Copyright 2015 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.
  */
 
@@ skipping 200 matching lines @@
   }
 
   static StackTraceElement[] concatStackTraces(
       StackTraceElement[] inner, StackTraceElement[] outer) {
     final StackTraceElement[] combined = new StackTraceElement[inner.length + outer.length];
     System.arraycopy(inner, 0, combined, 0, inner.length);
     System.arraycopy(outer, 0, combined, inner.length, outer.length);
     return combined;
   }
 }