Linux: change protobuf default option to allow building

chrome/common/safe_browsing/csd.proto

 // 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.
 //
 // Client side phishing and malware detection request and response
 // protocol buffers.  Those protocol messages should be kept in sync
 // with the server implementation.
 //
 // If you want to change this protocol definition or you have questions
 // regarding its format please contact chrome-anti-phishing@googlegroups.com.
 
 syntax = "proto2";
 
-option optimize_for = LITE_RUNTIME;
-
 package safe_browsing;
 
 message ClientPhishingRequest {
   // URL that the client visited.  The CGI parameters are stripped by the
   // client.
   optional string url = 1;
 
   // A 5-byte SHA-256 hash prefix of the URL.  Before hashing the URL is
   // canonicalized, converted to a suffix-prefix expression and broadened
   // (www prefix is removed and everything past the last '/' is stripped).
@@ skipping 209 matching lines @@
 
   // Stores the information of the user who provided the feedback.
   optional UserInformation user_information = 3;
 
   // Unstructed comments provided by the user.
   optional bytes comment = 4;
 
   // The original download response sent from the verdict server.
   optional ClientDownloadResponse download_response = 5;
 }