Replace NULL with nullptr in all C++ files.

webrtc/media/base/streamparams_unittest.cc

 /*
  *  Copyright (c) 2012 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 74 matching lines @@
   EXPECT_TRUE(sp.has_ssrc_group("XYZ"));
   EXPECT_EQ(1U, sp.ssrc_groups.size());
   EXPECT_EQ(2U, sp.ssrc_groups[0].ssrcs.size());
   EXPECT_EQ(kSsrcs2[0], sp.ssrc_groups[0].ssrcs[0]);
   EXPECT_EQ(kSsrcs2[1], sp.ssrc_groups[0].ssrcs[1]);
 }
 
 TEST(StreamParams, GetSsrcGroup) {
   cricket::StreamParams sp =
       CreateStreamParamsWithSsrcGroup("XYZ", kSsrcs2, arraysize(kSsrcs2));
-  EXPECT_EQ(NULL, sp.get_ssrc_group("xyz"));
+  EXPECT_EQ(nullptr, sp.get_ssrc_group("xyz"));
   EXPECT_EQ(&sp.ssrc_groups[0], sp.get_ssrc_group("XYZ"));
 }
 
 TEST(StreamParams, EqualNotEqual) {
   cricket::StreamParams l1 = cricket::StreamParams::CreateLegacy(1);
   cricket::StreamParams l2 = cricket::StreamParams::CreateLegacy(2);
   cricket::StreamParams sg1 =
       CreateStreamParamsWithSsrcGroup("ABC", kSsrcs1, arraysize(kSsrcs1));
   cricket::StreamParams sg2 =
       CreateStreamParamsWithSsrcGroup("ABC", kSsrcs2, arraysize(kSsrcs2));
@@ skipping 195 matching lines @@
   cricket::StreamParams stream3 =
       cricket::CreateSimStreamParams("cname", MAKE_VECTOR(kSsrcs2));
   std::vector<uint32_t> sim_ssrcs = MAKE_VECTOR(kRtxSsrcs3);
   cricket::SsrcGroup sg(cricket::kSimSsrcGroupSemantics, sim_ssrcs);
   for (size_t i = 0; i < sim_ssrcs.size(); i++) {
     stream3.add_ssrc(sim_ssrcs[i]);
   }
   stream3.ssrc_groups.push_back(sg);
   EXPECT_FALSE(cricket::IsSimulcastStream(stream3));
 }