XXX test gn format everything

third_party/android_protobuf/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.
 
 if (current_toolchain == host_toolchain) {
   # GYP: //third_party/android_protobuf/android_protobuf.gyp:android_protoc
   executable("android_protoc") {
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
 
     deps = [
-      "//third_party/zlib"
+      "//third_party/zlib",
     ]
 
     sources = [
       "src/src/google/protobuf/descriptor.cc",
       "src/src/google/protobuf/descriptor.pb.cc",
       "src/src/google/protobuf/descriptor_database.cc",
       "src/src/google/protobuf/dynamic_message.cc",
       "src/src/google/protobuf/extension_set.cc",
       "src/src/google/protobuf/extension_set_heavy.cc",
       "src/src/google/protobuf/generated_message_reflection.cc",
@@ skipping 106 matching lines @@
       "src/java/src/main/java/com/google/protobuf/nano/Extension.java",
       "src/java/src/main/java/com/google/protobuf/nano/InternalNano.java",
       "src/java/src/main/java/com/google/protobuf/nano/InvalidProtocolBufferNanoException.java",
       "src/java/src/main/java/com/google/protobuf/nano/MessageNano.java",
       "src/java/src/main/java/com/google/protobuf/nano/MessageNanoPrinter.java",
       "src/java/src/main/java/com/google/protobuf/nano/UnknownFieldData.java",
       "src/java/src/main/java/com/google/protobuf/nano/WireFormatNano.java",
     ]
   }
 }