replace NULL->nullptr in src/remoting.

remoting/protocol/jingle_messages_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/protocol/jingle_messages.h"
 
 #include "base/logging.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
@@ skipping 23 matching lines @@
     return false;
   }
   if (exp->BodyText() != val->BodyText()) {
     *error = "<" + exp->Name().LocalPart() + ">" + exp->BodyText() +
         "</" + exp->Name().LocalPart() + ">" " is expected, but found " +
         "<" + exp->Name().LocalPart() + ">" + val->BodyText() +
         "</" + exp->Name().LocalPart() + ">";
     return false;
   }
 
-  for (const XmlAttr* exp_attr = exp->FirstAttr(); exp_attr != NULL;
+  for (const XmlAttr* exp_attr = exp->FirstAttr(); exp_attr != nullptr;
        exp_attr = exp_attr->NextAttr()) {
     if (exp_attr->Name().Namespace() == kXmlNsNs ||
         exp_attr->Name() == QName(kXmlNs)) {
       continue; // Skip NS attributes.
     }
     if (val->Attr(exp_attr->Name()) != exp_attr->Value()) {
       *error = "In <" + exp->Name().LocalPart() + "> attribute " +
           exp_attr->Name().LocalPart() + " is expected to be set to " +
           exp_attr->Value();
       return false;
@@ skipping 194 matching lines @@
       XmlElement::ForStr(kTestSessionTerminateMessage));
   ASSERT_TRUE(source_message.get());
 
   EXPECT_TRUE(JingleMessage::IsJingleMessage(source_message.get()));
 
   JingleMessage message;
   std::string error;
   EXPECT_TRUE(message.ParseXml(source_message.get(), &error)) << error;
 
   EXPECT_EQ(message.action, JingleMessage::SESSION_INFO);
-  ASSERT_TRUE(message.info.get() != NULL);
+  ASSERT_TRUE(message.info.get() != nullptr);
   EXPECT_TRUE(message.info->Name() ==
               buzz::QName("urn:xmpp:jingle:1", "test-info"));
 
   scoped_ptr<XmlElement> formatted_message(message.ToXml());
   ASSERT_TRUE(formatted_message.get());
   EXPECT_TRUE(VerifyXml(source_message.get(), formatted_message.get(), &error))
       << error;
 }
 
 TEST(JingleMessageReplyTest, ToXml) {
@@ skipping 95 matching lines @@
   EXPECT_FALSE(JingleMessage::IsJingleMessage(source_message.get()));
 
   JingleMessage message;
   std::string error;
   EXPECT_FALSE(message.ParseXml(source_message.get(), &error));
   EXPECT_FALSE(error.empty());
 }
 
 }  // namespace protocol
 }  // namespace remoting