Implement serial API for Windows.

chrome/common/extensions/api/experimental_serial.idl

 // 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.
 
 // File-level comment to appease parser. Eventually this will not be necessary.
 
 [nodoc] namespace experimental.serial {
 
   callback GetPortsCallback = void (DOMString[] ports);
 
   dictionary OpenInfo {
     // The id of the opened connection.
     long connectionId;
   };
 
   callback OpenCallback = void (OpenInfo openInfo);
 
   callback CloseCallback = void (boolean result);
 
   dictionary ReadInfo {
     // The number of bytes received, or a negative number if an error occurred.
     long bytesRead;
 
-    // The data received. Warning: will probably become a blob or other
-    // appropriate binary-friendly type.
-    // TODO(miket): [instanceOf=ArrayBuffer]object data;
-    long[] data;
+    // The data received.
+    ArrayBuffer data;
   };
 
   callback ReadCallback = void (ReadInfo readInfo);
 
   dictionary WriteInfo {
     // The number of bytes written.
     long bytesWritten;
   };
 
   callback WriteCallback = void (WriteInfo writeInfo);
@@ skipping 21 matching lines @@
     // Reads a byte from the given connection.
     // |connectionId| : The id of the connection.
     // |callback| : Called when the byte has been read or the read blocked.
     static void read(long connectionId,
                      ReadCallback callback);
 
     // Writes a string to the given connection.
     // |connectionId| : The id of the connection.
     // |data| : The string to write.
     // |callback| : Called when the string has been written.
-    //
-    // TODO(miket): [instanceOf=ArrayBuffer]object data;
     static void write(long connectionId,
-                      long[] data,
+                      ArrayBuffer data,
                       WriteCallback callback);
   };
 
 };