Update comment about additional_res_packages in java_apk.gypi

build/java_apk.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 build Android APKs in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my_package_apk',
 #   'type': 'none',
 #   'variables': {
 #     'apk_name': 'MyPackage',
 #     'java_in_dir': 'path/to/package/root',
 #     'resource_dir': 'path/to/package/root/res',
 #   },
 #   'includes': ['path/to/this/gypi/file'],
 # }
 #
 # Required variables:
 #  apk_name - The final apk will be named <apk_name>.apk
 #  java_in_dir - The top-level java directory. The src should be in
 #    <(java_in_dir)/src.
 # Optional/automatic variables:
 #  additional_input_paths - These paths will be included in the 'inputs' list to
 #    ensure that this target is rebuilt when one of these paths changes.
-#  additional_res_dirs - Additional directories containing Android resources.
-#  additional_res_packages - Package names of the R.java files corresponding to
-#    each directory in additional_res_dirs.
+#  additional_res_packages - Package names of R.java files generated in addition
+#    to the default package name defined in AndroidManifest.xml.
 #  additional_src_dirs - Additional directories with .java files to be compiled
 #    and included in the output of this target.
 #  additional_bundled_libs - Additional libraries what will be stripped and
 #    bundled in the apk.
 #  asset_location - The directory where assets are located.
 #  generated_src_dirs - Same as additional_src_dirs except used for .java files
 #    that are generated at build time. This should be set automatically by a
 #    target's dependencies. The .java files in these directories are not
 #    included in the 'inputs' list (unlike additional_src_dirs).
 #  input_jars_paths - The path to jars to be included in the classpath. This
@@ skipping 887 matching lines @@
         '-DEMMA_INSTRUMENT=<(emma_instrument)',
         '-DEMMA_DEVICE_JAR=<(emma_device_jar)',
 
         '-Dbasedir=.',
         '-buildfile',
         '<(DEPTH)/build/android/ant/apk-package.xml',
       ]
     },
   ],
 }