Convert GN visibility variables to lists.

chrome/common/BUILD.gn

 # Copyright 2014 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.
 
 import("//tools/grit/grit_rule.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("../chrome_common.gypi") ],
     "scope",
@@ skipping 226 matching lines @@
   if (safe_browsing_mode == 2) {
     defines += [ "MOBILE_SAFE_BROWSING" ]
   }
 }
 
 if (is_linux) {
   # TODO(brettw) this duplicates "//chrome/common:version" which applies to
   # Windows.
   import("//chrome/version.gni")
   process_version("version") {
-    visibility = ":common"
+    visibility = [ ":common" ]
     source = "chrome_version_info_posix.h.version"
     output = "$target_gen_dir/chrome_version_info_posix.h"
   }
 } else {
   # Other platforms have a different way to do versioning.
   group("version") {
   }
 }
 
 # GN version: chrome/common_constants.gyp:common_constants
@@ skipping 30 matching lines @@
     "//components/bookmarks/common",
     "//third_party/widevine/cdm:version_h",
   ]
 
   if (enable_nacl) {
     deps += [
       #'../components/nacl.gyp:nacl_switches',  TODO(GYP)
     ]
   }
 }