Replace NULL with nullptr in all C++ files.

webrtc/modules/utility/source/helpers_android.cc

 /*
  *  Copyright (c) 2013 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.
  */
 
 #include "webrtc/base/checks.h"
 #include "webrtc/modules/utility/include/helpers_android.h"
 
 #include <android/log.h>
 #include <assert.h>
 #include <pthread.h>
 #include <stddef.h>
 #include <unistd.h>
 
 #define TAG "HelpersAndroid"
 #define ALOGD(...) __android_log_print(ANDROID_LOG_DEBUG, TAG, __VA_ARGS__)
 
 namespace webrtc {
 
 JNIEnv* GetEnv(JavaVM* jvm) {
-  void* env = NULL;
+  void* env = nullptr;
   jint status = jvm->GetEnv(&env, JNI_VERSION_1_6);
-  RTC_CHECK(((env != NULL) && (status == JNI_OK)) ||
-            ((env == NULL) && (status == JNI_EDETACHED)))
+  RTC_CHECK(((env != nullptr) && (status == JNI_OK)) ||
+            ((env == nullptr) && (status == JNI_EDETACHED)))
       << "Unexpected GetEnv return: " << status << ":" << env;
   return reinterpret_cast<JNIEnv*>(env);
 }
 
 // Return a |jlong| that will correctly convert back to |ptr|.  This is needed
 // because the alternative (of silently passing a 32-bit pointer to a vararg
 // function expecting a 64-bit param) picks up garbage in the high 32 bits.
 jlong PointerTojlong(void* ptr) {
   static_assert(sizeof(intptr_t) <= sizeof(jlong),
                 "Time to rethink the use of jlongs");
@@ skipping 36 matching lines @@
   RTC_CHECK(ret);
   return ret;
 }
 
 void DeleteGlobalRef(JNIEnv* jni, jobject o) {
   jni->DeleteGlobalRef(o);
   CHECK_EXCEPTION(jni) << "Error during DeleteGlobalRef";
 }
 
 std::string GetThreadId() {
-  char buf[21];  // Big enough to hold a kuint64max plus terminating NULL.
+  char buf[21];  // Big enough to hold a kuint64max plus terminating nullptr.
   int thread_id = gettid();
   RTC_CHECK_LT(snprintf(buf, sizeof(buf), "%i", thread_id),
                static_cast<int>(sizeof(buf)))
       << "Thread id is bigger than uint64??";
   return std::string(buf);
 }
 
 std::string GetThreadInfo() {
   return "@[tid=" + GetThreadId() + "]";
 }
 
 AttachThreadScoped::AttachThreadScoped(JavaVM* jvm)
-    : attached_(false), jvm_(jvm), env_(NULL) {
+    : attached_(false), jvm_(jvm), env_(nullptr) {
   env_ = GetEnv(jvm);
   if (!env_) {
     // Adding debug log here so we can track down potential leaks and figure
     // out why we sometimes see "Native thread exiting without having called
     // DetachCurrentThread" in logcat outputs.
     ALOGD("Attaching thread to JVM%s", GetThreadInfo().c_str());
-    jint res = jvm->AttachCurrentThread(&env_, NULL);
+    jint res = jvm->AttachCurrentThread(&env_, nullptr);
     attached_ = (res == JNI_OK);
     RTC_CHECK(attached_) << "AttachCurrentThread failed: " << res;
   }
 }
 
 AttachThreadScoped::~AttachThreadScoped() {
   if (attached_) {
     ALOGD("Detaching thread from JVM%s", GetThreadInfo().c_str());
     jint res = jvm_->DetachCurrentThread();
     RTC_CHECK(res == JNI_OK) << "DetachCurrentThread failed: " << res;
     RTC_CHECK(!GetEnv(jvm_));
   }
 }
 
 JNIEnv* AttachThreadScoped::env() { return env_; }
 
 }  // namespace webrtc