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

mojo/embedder/simple_platform_shared_buffer_win.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 "mojo/embedder/simple_platform_shared_buffer.h"
 
 #include <windows.h>
 
 #include <limits>
 
@@ skipping 16 matching lines @@
     return false;
   }
 
   // IMPORTANT NOTE: Unnamed objects are NOT SECURABLE. Thus if we ever want to
   // share read-only to other processes, we'll have to name our file mapping
   // object.
   // TODO(vtl): Unlike |base::SharedMemory|, we don't round up the size (to a
   // multiple of 64 KB). This may cause problems with NaCl. Cross this bridge
   // when we get there. crbug.com/210609
   handle_.reset(PlatformHandle(CreateFileMapping(INVALID_HANDLE_VALUE,
-                                                 NULL,
+                                                 nullptr,
                                                  PAGE_READWRITE,
                                                  0,
                                                  static_cast<DWORD>(num_bytes_),
-                                                 NULL)));
+                                                 nullptr)));
   if (!handle_.is_valid()) {
     PLOG(ERROR) << "CreateFileMapping";
     return false;
   }
 
   return true;
 }
 
 bool SimplePlatformSharedBuffer::InitFromPlatformHandle(
     ScopedPlatformHandle platform_handle) {
@@ skipping 34 matching lines @@
 
 // SimplePlatformSharedBufferMapping -------------------------------------------
 
 void SimplePlatformSharedBufferMapping::Unmap() {
   BOOL result = UnmapViewOfFile(real_base_);
   PLOG_IF(ERROR, !result) << "UnmapViewOfFile";
 }
 
 }  // namespace embedder
 }  // namespace mojo