Add proto_java_library to gn

build/protoc_java.gypi

 # 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.
 
 # This file is meant to be included into a target to provide a rule
 # to invoke protoc in a consistent manner. This is only to be included
 # for Java targets. When including this file, a .jar-file will be generated.
 # For other targets, see protoc.gypi.
 #
 # To use this, create a gyp target with the following form:
@@ skipping 47 matching lines @@
         '<(script)',
         '<(protoc)',
         '<@(_sources)',
       ],
       # We do not know the names of the generated files, so we use a stamp.
       'outputs': [
         '<(stamp_file)',
       ],
       'action': [
         '<(script)',
-        '<(protoc)',
-        '<(proto_in_dir)',
-        '<(java_out_dir)',
-        '<(stamp_file)',
+        '--protoc=<(protoc)',
+        '--proto-path=<(proto_in_dir)',
+        '--java-out-dir=<(java_out_dir)',
+        '--stamp=<(stamp_file)',
         '<@(_sources)',
       ],
       'message': 'Generating Java code from protobuf files in <(proto_in_dir)',
     },
   ],
   'dependencies': [
     '<(DEPTH)/third_party/android_protobuf/android_protobuf.gyp:android_protoc#host',
     '<(DEPTH)/third_party/android_protobuf/android_protobuf.gyp:protobuf_nano_javalib',
   ],
   'includes': [ 'java.gypi' ],
 }