[rtp_rtcp] fixed namespaces lint warnings

webrtc/modules/rtp_rtcp/source/vp8_partition_aggregator.h

 /*
  *  Copyright (c) 2011 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 114 matching lines @@
                                       int max_size);
 
  private:
   PartitionTreeNode* root_;
   size_t num_partitions_;
   size_t* size_vector_;
   size_t largest_partition_size_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(Vp8PartitionAggregator);
 };
-}  // namespace
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_VP8_PARTITION_AGGREGATOR_H_