Add reprioritization to socket pools.

net/socket/client_socket_handle.cc

Index: net/socket/client_socket_handle.cc
diff --git a/net/socket/client_socket_handle.cc b/net/socket/client_socket_handle.cc
index 905128a86aa5bc776be5f065c8832fb834a6d140..3de9fd1eb713e540e73b9f9288fdc6d0eefdd114 100644
--- a/net/socket/client_socket_handle.cc
+++ b/net/socket/client_socket_handle.cc
@@ -31,6 +31,17 @@ ClientSocketHandle::~ClientSocketHandle() {
   Reset();
 }
 
+void ClientSocketHandle::SetPriority(RequestPriority priority) {
+  if (socket_) {
+    // The priority of the handle is no longer relevant to the socket pool;
+    // just return.
+    return;
+  }
+
+  if (pool_)
+    pool_->SetPriority(group_name_, this, priority);
+}
+
 void ClientSocketHandle::Reset() {
   ResetInternal(true);
   ResetErrorState();