Convert GN visibility to lists.

Source/core/inspector/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("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
-visibility = "//third_party/WebKit/Source/*"
+visibility = [ "//third_party/WebKit/Source/*" ]
 
 protocol_file = "../../devtools/protocol.json"
 
 action("protocol_sources") {
   script = "CodeGeneratorInspector.py"
 
   inputs = [
     # The helper script imported by CodeGeneratorInspector.py.
     "CodeGeneratorInspectorStrings.py",
     protocol_file,
@@ skipping 45 matching lines @@
 
   inputs = [ protocol_file ]
   output_file = "$blink_core_output_dir/InspectorProtocolVersion.h"
   outputs = [ output_file ]
 
   args = [
     "-o", rebase_path(output_file, root_build_dir),
     rebase_path(protocol_file, root_build_dir),
   ]
 }