Replace NULL with nullptr in all C++ files.

webrtc/base/macconversion.cc

 /*
  *  Copyright 2004 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.
  */
 
 #if defined(WEBRTC_MAC) || defined(WEBRTC_IOS)
 
 #include <CoreFoundation/CoreFoundation.h>
 
 #include "webrtc/base/logging.h"
 #include "webrtc/base/macconversion.h"
 
 bool p_convertHostCFStringRefToCPPString(
   const CFStringRef cfstr, std::string& cppstr) {
   bool result = false;
 
   // First this must be non-null,
-  if (NULL != cfstr) {
+  if (nullptr != cfstr) {
     // it must actually *be* a CFString, and not something just masquerading
     // as one,
     if (CFGetTypeID(cfstr) == CFStringGetTypeID()) {
       // and we must be able to get the characters out of it.
       // (The cfstr owns this buffer; it came from somewhere else,
       // so someone else gets to take care of getting rid of the cfstr,
       // and then this buffer will go away automatically.)
       unsigned length = CFStringGetLength(cfstr);
       char* buf = new char[1 + length];
       if (CFStringGetCString(cfstr, buf, 1 + length, kCFStringEncodingASCII)) {
         if (strlen(buf) == length) {
           cppstr.assign(buf);
           result = true;
         }
       }
       delete [] buf;
     }
   }
 
   return result;
 }
 
 bool p_convertCFNumberToInt(CFNumberRef cfn, int* i) {
   bool converted = false;
 
   // It must not be null.
-  if (NULL != cfn) {
+  if (nullptr != cfn) {
     // It must actually *be* a CFNumber and not something just masquerading
     // as one.
     if (CFGetTypeID(cfn) == CFNumberGetTypeID()) {
       CFNumberType ntype = CFNumberGetType(cfn);
       switch (ntype) {
         case kCFNumberSInt8Type:
           SInt8 sint8;
           converted = CFNumberGetValue(cfn, ntype, static_cast<void*>(&sint8));
           if (converted) *i = static_cast<int>(sint8);
           break;
@@ skipping 89 matching lines @@
   bool converted = p_convertCFNumberToInt(cfn, &asInt);
 
   if (converted && (0 != asInt)) {
     result = true;
   }
 
   return result;
 }
 
 #endif  // WEBRTC_MAC || WEBRTC_IOS