Replace NULL with nullptr in all C++ files.

webrtc/p2p/base/stun.cc

Index: webrtc/p2p/base/stun.cc
diff --git a/webrtc/p2p/base/stun.cc b/webrtc/p2p/base/stun.cc
index b66ac0308a326418b580a5c0e92a3fddf7d2cec6..2c9e557fbb06c6362b7a6cb671a4b6d9fa60196e 100644
--- a/webrtc/p2p/base/stun.cc
+++ b/webrtc/p2p/base/stun.cc
@@ -406,7 +406,7 @@ const StunAttribute* StunMessage::GetAttribute(int type) const {
     if ((*attrs_)[i]->type() == type)
       return (*attrs_)[i];
   }
-  return NULL;
+  return nullptr;
 }
 
 bool StunMessage::IsValidTransactionId(const std::string& transaction_id) {
@@ -455,7 +455,7 @@ StunAttribute* StunAttribute::Create(StunAttributeValueType value_type,
     case STUN_VALUE_UINT16_LIST:
       return new StunUInt16ListAttribute(type, length);
     default:
-      return NULL;
+      return nullptr;
   }
 }
 
@@ -464,7 +464,7 @@ StunAddressAttribute* StunAttribute::CreateAddress(uint16_t type) {
 }
 
 StunXorAddressAttribute* StunAttribute::CreateXorAddress(uint16_t type) {
-  return new StunXorAddressAttribute(type, 0, NULL);
+  return new StunXorAddressAttribute(type, 0, nullptr);
 }
 
 StunUInt64Attribute* StunAttribute::CreateUInt64(uint16_t type) {
@@ -562,8 +562,7 @@ bool StunAddressAttribute::Write(ByteBufferWriter* buf) const {
 
 StunXorAddressAttribute::StunXorAddressAttribute(uint16_t type,
                                                  const rtc::SocketAddress& addr)
-    : StunAddressAttribute(type, addr), owner_(NULL) {
-}
+    : StunAddressAttribute(type, addr), owner_(nullptr) {}
 
 StunXorAddressAttribute::StunXorAddressAttribute(uint16_t type,
                                                  uint16_t length,
@@ -694,25 +693,23 @@ bool StunUInt64Attribute::Write(ByteBufferWriter* buf) const {
 }
 
 StunByteStringAttribute::StunByteStringAttribute(uint16_t type)
-    : StunAttribute(type, 0), bytes_(NULL) {
-}
+    : StunAttribute(type, 0), bytes_(nullptr) {}
 
 StunByteStringAttribute::StunByteStringAttribute(uint16_t type,
                                                  const std::string& str)
-    : StunAttribute(type, 0), bytes_(NULL) {
+    : StunAttribute(type, 0), bytes_(nullptr) {
   CopyBytes(str.c_str(), str.size());
 }
 
 StunByteStringAttribute::StunByteStringAttribute(uint16_t type,
                                                  const void* bytes,
                                                  size_t length)
-    : StunAttribute(type, 0), bytes_(NULL) {
+    : StunAttribute(type, 0), bytes_(nullptr) {
   CopyBytes(bytes, length);
 }
 
 StunByteStringAttribute::StunByteStringAttribute(uint16_t type, uint16_t length)
-    : StunAttribute(type, length), bytes_(NULL) {
-}
+    : StunAttribute(type, length), bytes_(nullptr) {}
 
 StunByteStringAttribute::~StunByteStringAttribute() {
   delete [] bytes_;
@@ -729,13 +726,13 @@ void StunByteStringAttribute::CopyBytes(const void* bytes, size_t length) {
 }
 
 uint8_t StunByteStringAttribute::GetByte(size_t index) const {
-  RTC_DCHECK(bytes_ != NULL);
+  RTC_DCHECK(bytes_ != nullptr);
   RTC_DCHECK(index < length());
   return static_cast<uint8_t>(bytes_[index]);
 }
 
 void StunByteStringAttribute::SetByte(size_t index, uint8_t value) {
-  RTC_DCHECK(bytes_ != NULL);
+  RTC_DCHECK(bytes_ != nullptr);
   RTC_DCHECK(index < length());
   bytes_[index] = value;
 }