Add a gyp variable to indicate additional native libraries to be included in the APK

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',
@@ skipping 116 matching lines @@
           'apk_package_native_libs_dir': '<(intermediate_dir)/libs.managed',
         }, {
           'apk_package_native_libs_dir': '<(intermediate_dir)/libs',
         }],
       ],
     },
     'native_lib_target%': '',
     'emma_instrument': '<(emma_coverage)',
     'apk_package_native_libs_dir': '<(apk_package_native_libs_dir)',
     'unsigned_standalone_apk_path': '<(unsigned_standalone_apk_path)',
+    'extra_native_libs': [],
   },
   # Pass the jar path to the apk's "fake" jar target.  This would be better as
   # direct_dependent_settings, but a variable set by a direct_dependent_settings
   # cannot be lifted in a dependent to all_dependent_settings.
   'all_dependent_settings': {
     'variables': {
       'apk_output_jar_path': '<(PRODUCT_DIR)/lib.java/<(jar_name)',
     },
   },
   'conditions': [
@@ skipping 28 matching lines @@
         ],
       },
       'copies': [
         {
           # gdbserver is always copied into the APK's native libs dir. The ant
           # build scripts (apkbuilder task) will only include it in a debug
           # build.
           'destination': '<(apk_package_native_libs_dir)/<(android_app_abi)',
           'files': [
             '<(android_gdbserver)',
+            '<@(extra_native_libs)',
           ],
         },
       ],
       'actions': [
         {
           'variables': {
-            'input_libraries': ['<@(native_libs_paths)'],
+            'input_libraries': [
+              '<@(native_libs_paths)',
+              '<@(extra_native_libs)',
+            ],
           },
           'includes': ['../build/android/write_ordered_libraries.gypi'],
         },
         {
           'action_name': 'native_libraries_template_data_<(_target_name)',
           'message': 'Creating native_libraries_list.h for <(_target_name).',
           'inputs': [
             '<(DEPTH)/build/android/gyp/util/build_utils.py',
             '<(DEPTH)/build/android/gyp/create_native_libraries_header.py',
             '<(ordered_libraries_file)',
@@ skipping 26 matching lines @@
             '--output=<(native_libraries_java_file)',
             '--template=<(native_libraries_template)',
             '--stamp=<(native_libraries_java_stamp)',
           ],
         },
         {
           'action_name': 'strip_native_libraries',
           'variables': {
             'ordered_libraries_file%': '<(ordered_libraries_file)',
             'stripped_libraries_dir': '<(libraries_source_dir)',
-            'input_paths': ['<@(native_libs_paths)'],
+            'input_paths': [
+              '<@(native_libs_paths)',
+              '<@(extra_native_libs)',
+            ],
             'stamp': '<(strip_stamp)'
           },
           'includes': ['../build/android/strip_native_libraries.gypi'],
         },
       ],
       'conditions': [
         ['gyp_managed_install == 1', {
           'variables': {
             'libraries_top_dir': '<(intermediate_dir)/lib.stripped',
             'libraries_source_dir': '<(libraries_top_dir)/lib/<(android_app_abi)',
@@ skipping 419 matching lines @@
         '<(DEPTH)/build/android/ant/apk-package.xml',
 
         # Add list of inputs to the command line, so if inputs change
         # (e.g. if a Java file is removed), the command will be re-run.
         # TODO(newt): remove this once crbug.com/177552 is fixed in ninja.
         '-DTHIS_IS_IGNORED=>!(echo \'>(_inputs)\' | md5sum)',
       ]
     },
   ],
 }