Linux: change protobuf default option to allow building

chrome/browser/chromeos/drive/drive.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.
 //
 // Protocol buffer definitions for serializing Drive files and directories.
 
 syntax = "proto2";
 
-option optimize_for = LITE_RUNTIME;
-
 package drive;
 
 // Represents base::PlatformFileInfo.
 message PlatformFileInfoProto {
   optional int64 size = 1;
   optional bool is_directory = 2;
   optional bool is_symbolic_link = 3;
   optional int64 last_modified = 4;
   optional int64 last_accessed = 5;
   optional int64 creation_time = 6;
@@ skipping 91 matching lines @@
 
   // True if the file is a mounted archive file.
   optional bool is_mounted = 5;
 
   // True if the file is in the persistent directory.
   optional bool is_persistent = 6;
 
   // When adding a new state, be sure to update TestDriveCacheState and test
   // functions defined in drive_test_util.cc.
 }