replace NULL->nullptr in src/remoting.

remoting/client/jni/chromoting_jni_runtime.cc

 // Copyright 2013 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/client/jni/chromoting_jni_runtime.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 28 matching lines @@
 // points for JNI calls from Java into C++.
 
 static void LoadNative(JNIEnv* env, jclass clazz, jobject context) {
   base::android::ScopedJavaLocalRef<jobject> context_activity(env, context);
   base::android::InitApplicationContext(env, context_activity);
 
   // The google_apis functions check the command-line arguments to make sure no
   // runtime API keys have been specified by the environment. Unfortunately, we
   // neither launch Chromium nor have a command line, so we need to prevent
   // them from DCHECKing out when they go looking.
-  base::CommandLine::Init(0, NULL);
+  base::CommandLine::Init(0, nullptr);
 
   // Create the singleton now so that the Chromoting threads will be set up.
   remoting::ChromotingJniRuntime::GetInstance();
 }
 
 static jstring GetApiKey(JNIEnv* env, jclass clazz) {
   return ConvertUTF8ToJavaString(
       env, google_apis::GetAPIKey().c_str()).Release();
 }
 
@@ skipping 178 matching lines @@
                                        host_pubkey,
                                        pairing_id,
                                        pairing_secret,
                                        capabilities);
 }
 
 void ChromotingJniRuntime::DisconnectFromHost() {
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
   if (session_.get()) {
     session_->Disconnect();
-    session_ = NULL;
+    session_ = nullptr;
   }
 }
 
 void ChromotingJniRuntime::OnConnectionState(
     protocol::ConnectionToHost::State state,
     protocol::ErrorCode error) {
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
 
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_JniInterface_onConnectionState(env, state, error);
@@ skipping 98 matching lines @@
 
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_JniInterface_redrawGraphicsInternal(env);
 }
 
 void ChromotingJniRuntime::DetachFromVmAndSignal(base::WaitableEvent* waiter) {
   base::android::DetachFromVM();
   waiter->Signal();
 }
 }  // namespace remoting