Mojo: NULL -> nullptr in mojo/system and mojo/embedder.

mojo/system/core_test_base.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 "mojo/system/core_test_base.h"
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 163 matching lines @@
 CoreTestBase::~CoreTestBase() {
 }
 
 void CoreTestBase::SetUp() {
   core_ = new Core(scoped_ptr<embedder::PlatformSupport>(
       new embedder::SimplePlatformSupport()));
 }
 
 void CoreTestBase::TearDown() {
   delete core_;
-  core_ = NULL;
+  core_ = nullptr;
 }
 
 MojoHandle CoreTestBase::CreateMockHandle(CoreTestBase::MockHandleInfo* info) {
   CHECK(core_);
   scoped_refptr<MockDispatcher> dispatcher(new MockDispatcher(info));
   return core_->AddDispatcher(dispatcher);
 }
 
 // CoreTestBase_MockHandleInfo -------------------------------------------------
 
@@ skipping 153 matching lines @@
 }
 
 void CoreTestBase_MockHandleInfo::IncrementCancelAllWaitersCallCount() {
   base::AutoLock locker(lock_);
   cancel_all_waiters_call_count_++;
 }
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo