Run clang-modernize -use-nullptr over src/extensions/.

extensions/renderer/messaging_bindings.cc

 // Copyright 2014 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 "extensions/renderer/messaging_bindings.h"
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 198 matching lines @@
         : object_(object), callback_(callback), isolate_(isolate) {}
 
     void RunCallback() {
       v8::HandleScope handle_scope(isolate_);
       v8::Handle<v8::Function> callback = callback_.NewHandle(isolate_);
       v8::Handle<v8::Context> context = callback->CreationContext();
       if (context.IsEmpty())
         return;
       v8::Context::Scope context_scope(context);
       blink::WebScopedMicrotaskSuppression suppression;
-      callback->Call(context->Global(), 0, NULL);
+      callback->Call(context->Global(), 0, nullptr);
     }
 
     ScopedPersistent<v8::Object> object_;
     ScopedPersistent<v8::Function> callback_;
     v8::Isolate* isolate_;
 
     DISALLOW_COPY_AND_ASSIGN(GCCallback);
   };
 
   // void BindToGC(object, callback)
@@ skipping 195 matching lines @@
     const ScriptContextSet& context_set,
     int port_id,
     const std::string& error_message,
     content::RenderView* restrict_to_render_view) {
   context_set.ForEach(
       restrict_to_render_view,
       base::Bind(&DispatchOnDisconnectToScriptContext, port_id, error_message));
 }
 
 }  // namespace extensions