replace NULL->nullptr in src/remoting.

remoting/host/policy_hack/policy_watcher.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.
 
 // Most of this code is copied from:
 //   src/chrome/browser/policy/asynchronous_policy_loader.{h,cc}
 
 #include "remoting/host/policy_hack/policy_watcher.h"
 
 #include "base/bind.h"
@@ skipping 22 matching lines @@
 // |default| if they are not set in |from|, or values from |bad_type_values| if
 // the value in |from| has the wrong type.
 scoped_ptr<base::DictionaryValue> CopyGoodValuesAndAddDefaults(
     const base::DictionaryValue* from,
     const base::DictionaryValue* default_values,
     const base::DictionaryValue* bad_type_values) {
   scoped_ptr<base::DictionaryValue> to(default_values->DeepCopy());
   for (base::DictionaryValue::Iterator i(*default_values);
        !i.IsAtEnd(); i.Advance()) {
 
-    const base::Value* value = NULL;
+    const base::Value* value = nullptr;
 
     // If the policy isn't in |from|, use the default.
     if (!from->Get(i.key(), &value)) {
       continue;
     }
 
     // If the policy is the wrong type, use the value from |bad_type_values|.
     if (!value->IsType(i.value().GetType())) {
       CHECK(bad_type_values->Get(i.key(), &value));
     }
@@ skipping 192 matching lines @@
 void PolicyWatcher::SignalTransientPolicyError() {
   const int kMaxRetryCount = 5;
   transient_policy_error_retry_counter_ += 1;
   if (transient_policy_error_retry_counter_ >= kMaxRetryCount) {
     SignalPolicyError();
   }
 }
 
 }  // namespace policy_hack
 }  // namespace remoting