replace NULL->nullptr in src/remoting.

remoting/host/desktop_process_unittest.cc

 // Copyright (c) 2012 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/host/desktop_process.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
@@ skipping 207 matching lines @@
   return input_injector;
 }
 
 webrtc::DesktopCapturer* DesktopProcessTest::CreateVideoCapturer() {
   return new FakeDesktopCapturer();
 }
 
 void DesktopProcessTest::DisconnectChannels() {
   daemon_channel_.reset();
   network_channel_.reset();
-  io_task_runner_ = NULL;
+  io_task_runner_ = nullptr;
 }
 
 void DesktopProcessTest::PostDisconnectChannels() {
   message_loop_.PostTask(FROM_HERE, base::Bind(
       &DesktopProcessTest::DisconnectChannels, base::Unretained(this)));
 }
 
 void DesktopProcessTest::RunDesktopProcess() {
   base::RunLoop run_loop;
   base::Closure quit_ui_task_runner = base::Bind(
@@ skipping 18 matching lines @@
       .Times(AnyNumber())
       .WillRepeatedly(Invoke(this,
                              &DesktopProcessTest::CreateDesktopEnvironment));
   EXPECT_CALL(*desktop_environment_factory, SupportsAudioCapture())
       .Times(AnyNumber())
       .WillRepeatedly(Return(false));
 
   DesktopProcess desktop_process(ui_task_runner, io_task_runner_, channel_name);
   EXPECT_TRUE(desktop_process.Start(desktop_environment_factory.Pass()));
 
-  ui_task_runner = NULL;
+  ui_task_runner = nullptr;
   run_loop.Run();
 }
 
 void DesktopProcessTest::RunDeathTest() {
   InSequence s;
   EXPECT_CALL(daemon_listener_, OnChannelConnected(_));
   EXPECT_CALL(daemon_listener_, OnDesktopAttached(_))
       .WillOnce(DoAll(
           Invoke(this, &DesktopProcessTest::OnDesktopAttached),
           InvokeWithoutArgs(this, &DesktopProcessTest::SendCrashRequest)));
@@ skipping 58 matching lines @@
 }
 
 // Run the desktop process and ask it to crash.
 TEST_F(DesktopProcessTest, DeathTest) {
   testing::GTEST_FLAG(death_test_style) = "threadsafe";
 
   EXPECT_DEATH(RunDeathTest(), "");
 }
 
 }  // namespace remoting