Move socket API from experimental to dev channel and remove some dead code

chrome/common/extensions/api/socket.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.
 
-namespace experimental.socket {
+namespace socket {
   enum SocketType {
     tcp,
     udp
   };
 
   // The socket options.
   dictionary CreateOptions {
-    // The schema generator does not support dictionaries without any fields.
-    // Ignore this field.
-    [nodoc] long? dummyValue;
   };
 
   dictionary CreateInfo {
     // The id of the newly created socket.
     long socketId;
   };
 
   callback CreateCallback = void (CreateInfo createInfo);
 
   callback ConnectCallback = void (long result);
@@ skipping 130 matching lines @@
     // Enable/disable Nagle algorithm.
     // |socketId| : The socketId.
     // |noDelay| : If true, disable Nagle algorithm.
     // |callback| : Called when the setNoDelay attempt is complete.
     static void setNoDelay(long socketId,
                            boolean noDelay,
                            SetNoDelayCallback callback);
   };
 
 };