Replace NULL with nullptr or null in webrtc/api/.

webrtc/api/jsep.h

 /*
  *  Copyright 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 50 matching lines @@
   virtual const cricket::Candidate& candidate() const = 0;
   // The URL of the ICE server which this candidate was gathered from.
   // TODO(zhihuang): Remove the default implementation once the subclasses
   // implement this method.
   virtual std::string server_url() const { return ""; }
   // Creates a SDP-ized form of this candidate.
   virtual bool ToString(std::string* out) const = 0;
 };
 
 // Creates a IceCandidateInterface based on SDP string.
-// Returns NULL if the sdp string can't be parsed.
-// |error| may be NULL.
+// Returns null if the sdp string can't be parsed.
+// |error| may be null.
 IceCandidateInterface* CreateIceCandidate(const std::string& sdp_mid,
                                           int sdp_mline_index,
                                           const std::string& sdp,
                                           SdpParseError* error);
 
 // This class represents a collection of candidates for a specific m= section.
 // Used in SessionDescriptionInterface.
 class IceCandidateCollection {
  public:
   virtual ~IceCandidateCollection() {}
@@ skipping 51 matching lines @@
   // Returns a collection of all candidates that belong to a certain m=
   // section.
   virtual const IceCandidateCollection* candidates(
       size_t mediasection_index) const = 0;
 
   // Serializes the description to SDP.
   virtual bool ToString(std::string* out) const = 0;
 };
 
 // Creates a SessionDescriptionInterface based on the SDP string and the type.
-// Returns NULL if the sdp string can't be parsed or the type is unsupported.
-// |error| may be NULL.
+// Returns null if the sdp string can't be parsed or the type is unsupported.
+// |error| may be null.
 SessionDescriptionInterface* CreateSessionDescription(const std::string& type,
                                                       const std::string& sdp,
                                                       SdpParseError* error);
 
 // CreateOffer and CreateAnswer callback interface.
 class CreateSessionDescriptionObserver : public rtc::RefCountInterface {
  public:
   // This callback transfers the ownership of the |desc|.
   // TODO(deadbeef): Make this take an std::unique_ptr<> to avoid confusion
   // around ownership.
@@ skipping 10 matching lines @@
   virtual void OnSuccess() = 0;
   virtual void OnFailure(const std::string& error) = 0;
 
  protected:
   ~SetSessionDescriptionObserver() {}
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_JSEP_H_