Replace NULL with nullptr.

extensions/browser/api/cast_channel/cast_framer.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 EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_FRAMER_H_
 #define EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_FRAMER_H_
 
 #include "base/basictypes.h"
 #include "extensions/common/api/cast_channel.h"
 #include "net/base/io_buffer.h"
@@ skipping 24 matching lines @@
   // Reads bytes from |input_buffer_| and returns a new CastMessage if one
   // is fully read.
   //
   // |num_bytes| The number of bytes received by a read operation.
   //             Value must be <= BytesRequested().
   // |message_length| Size of the deserialized message object, in bytes. For
   //                  logging purposes. Set to zero if no message was parsed.
   // |error| The result of the ingest operation. Set to CHANNEL_ERROR_NONE
   //         if no error occurred.
   // Returns A pointer to a parsed CastMessage if a message was received
-  //         in its entirety, NULL otherwise.
+  //         in its entirety, nullptr otherwise.
   scoped_ptr<CastMessage> Ingest(size_t num_bytes,
                                  size_t* message_length,
                                  ChannelError* error);
 
   // Message header struct. If fields are added, be sure to update
   // header_size().  Public to allow use of *_size() methods in unit tests.
   struct MessageHeader {
     MessageHeader();
     // Sets the message size.
     void SetMessageSize(size_t message_size);
@@ skipping 32 matching lines @@
 
   // Disables Ingest functionality is the parser receives invalid data.
   bool error_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageFramer);
 };
 }  // namespace cast_channel
 }  // namespace core_api
 }  // namespace extensions
 #endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_FRAMER_H_