Mojo: NULL -> nullptr in mojo/public/cpp/bindings and also for the bindings generator.

mojo/public/cpp/bindings/lib/shared_ptr.h

 // 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.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_SHARED_PTR_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_SHARED_PTR_H_
 
 #include "mojo/public/cpp/bindings/lib/shared_data.h"
 
 namespace mojo {
@@ skipping 24 matching lines @@
   const P* operator->() const { return get(); }
 
  private:
   class Impl {
    public:
     ~Impl() {
       if (ptr)
         delete ptr;
     }
 
-    Impl() : ptr(NULL) {
+    Impl() : ptr(nullptr) {
     }
 
     Impl(P* ptr) : ptr(ptr) {
     }
 
     P* ptr;
 
    private:
     MOJO_DISALLOW_COPY_AND_ASSIGN(Impl);
   };
 
   SharedData<Impl> impl_;
 };
 
 }  // namespace mojo
 }  // namespace internal
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_SHARED_PTR_H_