Factor out Sec-WebSocket-Accept computing logic so that the new WebSocket handshake processor can r…

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
index 0fd67f9691ba69503e4b9db33acd6f94cb7319fb..641b196806e85a4fd465845bd45f8f457321ac86 100644
--- a/net/websockets/websocket_handshake_handler.cc
+++ b/net/websockets/websocket_handshake_handler.cc
@@ -345,6 +345,16 @@ bool WebSocketHandshakeResponseHandler::HasResponse() const {
       static_cast<size_t>(original_header_length_) <= original_.size();
 }
 
+void ComputeSecWebSocketAccept(const std::string& key,
+                               std::string* accept) {
+  DCHECK(accept);
+
+  std::string hash =
+      base::SHA1HashString(key + websockets::kWebSocketGuid);
+  bool encode_success = base::Base64Encode(hash, accept);
+  DCHECK(encode_success);
+}
+
 bool WebSocketHandshakeResponseHandler::ParseResponseInfo(
     const HttpResponseInfo& response_info,
     const std::string& challenge) {
@@ -363,11 +373,8 @@ bool WebSocketHandshakeResponseHandler::ParseResponseInfo(
   AppendHeader(
       HttpRequestHeaders::kConnection, websockets::kUpgrade, &response_message);
 
-  std::string hash =
-      base::SHA1HashString(challenge + websockets::kWebSocketGuid);
   std::string websocket_accept;
-  bool encode_success = base::Base64Encode(hash, &websocket_accept);
-  DCHECK(encode_success);
+  ComputeSecWebSocketAccept(challenge, &websocket_accept);
   AppendHeader(
       websockets::kSecWebSocketAccept, websocket_accept, &response_message);