Replace NULL with nullptr in all C++ files.

webrtc/media/base/streamparams.cc

 /*
  *  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 129 matching lines @@
     ost << "cname:" << cname << ";";
   }
   if (!sync_label.empty()) {
     ost << "sync_label:" << sync_label;
   }
   ost << "}";
   return ost.str();
 }
 void StreamParams::GetPrimarySsrcs(std::vector<uint32_t>* ssrcs) const {
   const SsrcGroup* sim_group = get_ssrc_group(kSimSsrcGroupSemantics);
-  if (sim_group == NULL) {
+  if (sim_group == nullptr) {
     ssrcs->push_back(first_ssrc());
   } else {
     for (size_t i = 0; i < sim_group->ssrcs.size(); ++i) {
       ssrcs->push_back(sim_group->ssrcs[i]);
     }
   }
 }
 
 void StreamParams::GetFidSsrcs(const std::vector<uint32_t>& primary_ssrcs,
                                std::vector<uint32_t>* fid_ssrcs) const {
@@ skipping 75 matching lines @@
 static void RemoveFirst(std::list<uint32_t>* ssrcs, uint32_t value) {
   std::list<uint32_t>::iterator it =
       std::find(ssrcs->begin(), ssrcs->end(), value);
   if (it != ssrcs->end()) {
     ssrcs->erase(it);
   }
 }
 
 bool IsSimulcastStream(const StreamParams& sp) {
   const SsrcGroup* const sg = sp.get_ssrc_group(kSimSsrcGroupSemantics);
-  if (sg == NULL || sg->ssrcs.size() < 2) {
+  if (sg == nullptr || sg->ssrcs.size() < 2) {
     return false;
   }
   // Start with all StreamParams SSRCs. Remove simulcast SSRCs (from sg) and
   // RTX SSRCs. If we still have SSRCs left, we don't know what they're for.
   // Also we remove first-found SSRCs only. So duplicates should lead to errors.
   std::list<uint32_t> sp_ssrcs(sp.ssrcs.begin(), sp.ssrcs.end());
   for (size_t i = 0; i < sg->ssrcs.size(); ++i) {
     RemoveFirst(&sp_ssrcs, sg->ssrcs[i]);
   }
   for (size_t i = 0; i < sp.ssrc_groups.size(); ++i) {
     const SsrcGroup& group = sp.ssrc_groups[i];
     if (group.semantics.compare(kFidSsrcGroupSemantics) != 0 ||
         group.ssrcs.size() != 2) {
       continue;
     }
     RemoveFirst(&sp_ssrcs, group.ssrcs[1]);
   }
   // If there's SSRCs left that we don't know how to handle, we bail out.
   return sp_ssrcs.size() == 0;
 }
 
 }  // namespace cricket