[Android] Enable multidex for debug builds of ChromePublic.

build/android/gyp/configure_multidex.py

Index: build/android/gyp/configure_multidex.py
diff --git a/build/android/gyp/configure_multidex.py b/build/android/gyp/configure_multidex.py
new file mode 100755
index 0000000000000000000000000000000000000000..aa85d2ffb165546577e8464e20a2134cdd5bf191
--- /dev/null
+++ b/build/android/gyp/configure_multidex.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+# Copyright 2015 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.
+
+
+import argparse
+import json
+import sys
+
+from util import build_utils
+
+
+def ParseArgs():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--configuration-name', required=True,
+                      help='The build CONFIGURATION_NAME.')
+  parser.add_argument('--enabled-configurations', default=[],
+                      help='The configuration(s) for which multidex should be '
+                           'enabled. If not specified and --enable-multidex is '
+                           'passed, multidex will be enabled for all '
+                            'configurations.')
+  parser.add_argument('--multidex-configuration-path', required=True,
+                      help='The path to which the multidex configuration JSON '
+                           'should be saved.')
+
+  args = parser.parse_args()
+
+  if args.enabled_configurations:
+    args.enabled_configurations = build_utils.ParseGypList(
+        args.enabled_configurations)
+
+  return args
+
+
+def main():
+  args = ParseArgs()
+
+  multidex_enabled = (
+      (not args.enabled_configurations
+       or args.configuration_name in args.enabled_configurations))
+
+  config = {
+    'enabled': multidex_enabled,
+  }
+
+  with open(args.multidex_configuration_path, 'w') as f:
+    f.write(json.dumps(config))
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())
+