Add reprioritization to socket pools.

net/socket/client_socket_handle.h

 // 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.
 
 #ifndef NET_SOCKET_CLIENT_SOCKET_HANDLE_H_
 #define NET_SOCKET_CLIENT_SOCKET_HANDLE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 73 matching lines @@
   //
   template <typename PoolType>
   int Init(const std::string& group_name,
            const scoped_refptr<typename PoolType::SocketParams>& socket_params,
            RequestPriority priority,
            ClientSocketPool::RespectLimits respect_limits,
            const CompletionCallback& callback,
            PoolType* pool,
            const NetLogWithSource& net_log);
 
+  // Changes the priority of the ClientSocketHandle to the passed value.
+  // This function is a no-op if |priority| is the same as the current
+  // priority, of if Init() has not been called since the last time
+  // the ClientSocketHandle was reset.
+  void SetPriority(RequestPriority priority);
+
   // An initialized handle can be reset, which causes it to return to the
   // un-initialized state.  This releases the underlying socket, which in the
   // case of a socket that still has an established connection, indicates that
   // the socket may be kept alive for use by a subsequent ClientSocketHandle.
   //
   // NOTE: To prevent the socket from being kept alive, be sure to call its
   // Disconnect method.  This will result in the ClientSocketPool deleting the
   // StreamSocket.
   void Reset();
 
@@ skipping 150 matching lines @@
     user_callback_ = callback;
   } else {
     HandleInitCompletion(rv);
   }
   return rv;
 }
 
 }  // namespace net
 
 #endif  // NET_SOCKET_CLIENT_SOCKET_HANDLE_H_