Update from https://crrev.com/305340

net/websockets/websocket_handshake_handler.cc

Index: net/websockets/websocket_handshake_handler.cc
diff --git a/net/websockets/websocket_handshake_handler.cc b/net/websockets/websocket_handshake_handler.cc
deleted file mode 100644
index 6bcc2304cc057a7a579936cd4dbd530eb33de140..0000000000000000000000000000000000000000
--- a/net/websockets/websocket_handshake_handler.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-// 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.
-
-#include "net/websockets/websocket_handshake_handler.h"
-
-#include "base/base64.h"
-#include "base/logging.h"
-#include "base/sha1.h"
-#include "net/websockets/websocket_handshake_constants.h"
-
-namespace net {
-
-void ComputeSecWebSocketAccept(const std::string& key,
-                               std::string* accept) {
-  DCHECK(accept);
-
-  std::string hash =
-      base::SHA1HashString(key + websockets::kWebSocketGuid);
-  base::Base64Encode(hash, accept);
-}
-
-}  // namespace net