Support using loadable module for libpeerconnection on Android.

build/android/finalize_apk_action.gypi

+# Copyright 2013 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 an action to provide an action that
+# signs and zipaligns an APK.
+#
+# To use this, create a gyp action with the following form:
+#  {
+#    'action_name': 'some descriptive action name',
+#    'variables': {
+#      'inputs': [ 'input_path1', 'input_path2' ],
+#      'input_apk_path': 'relative/path/to/input.apk',
+#      'output_apk_path': 'relative/path/to/output.apk',
+#    },
+#    'includes': [ '../../build/android/finalize_apk.gypi' ],
+#  },
+#
+
+{
+  'message': 'Signing/aligning <(_target_name) APK: <(input_apk_path).',
+  'variables': {
+    'inputs': [],
+    'keystore_path%': '<(DEPTH)/build/android/ant/chromium-debug.keystore',
+  },
+  'inputs': [
+    '<(DEPTH)/build/android/gyp/util/build_utils.py',
+    '<(DEPTH)/build/android/gyp/finalize_apk.py',
+    '<(keystore_path)',
+    '<(input_apk_path)',
+    '>@(inputs)',
+  ],
+  'outputs': [
+    '<(output_apk_path)',
+  ],
+  'action': [
+    'python', '<(DEPTH)/build/android/gyp/finalize_apk.py',
+    '--android-sdk-root=<(android_sdk_root)',
+    '--unsigned-apk-path=<(input_apk_path)',
+    '--final-apk-path=<(output_apk_path)',
+    '--keystore-path=<(keystore_path)',
+
+    # TODO(newt): remove this once crbug.com/177552 is fixed in ninja.
+    '--ignore=>!(echo \'>(_inputs)\' | md5sum)',
+  ],
+}