[NOT FOR COMMIT] Added GN support for Android .AAR packaged libraries

build/android/gyp/unpack_aar.py

Index: build/android/gyp/unpack_aar.py
diff --git a/build/android/gyp/unpack_aar.py b/build/android/gyp/unpack_aar.py
new file mode 100755
index 0000000000000000000000000000000000000000..dea72fbe0425b0ae99ad77336ec682917a9b154f
--- /dev/null
+++ b/build/android/gyp/unpack_aar.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 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.
+
+"""Upacks the contents of an Android AAR."""
+
+import os
+import shutil
+import sys
+#import zipfile
+
+from util import build_utils
+
+
+def main():
+  if len(sys.argv) != 3:
+    print 'Usage: %s <aar_file> <output_dir>' % sys.argv[0]
+    sys.exit(1)
+
+  aar_file = sys.argv[1]  # e.g. library.aar
+  output_dir = sys.argv[2]  # e.g. path/to/output
+
+  # Clear previously extracted versions of the AAR
+  shutil.rmtree(output_dir, True)
+
+  build_utils.ExtractAll(aar_file, path=output_dir)
+
+
+if __name__ == '__main__':
+  sys.exit(main())