Fix android depfiles to always list GN's outputs[0]

components/cronet/tools/generate_javadoc.py

 #!/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 optparse
 import os
 import sys
 import tempfile
@@ skipping 39 matching lines @@
 
 def main():
   parser = optparse.OptionParser()
   build_utils.AddDepfileOption(parser)
   parser.add_option('--output-dir', help='Directory to put javadoc')
   parser.add_option('--input-dir', help='Root of cronet source')
   parser.add_option('--input-src-jar', help='Cronet api source jar')
   parser.add_option('--overview-file', help='Path of the overview page')
   parser.add_option('--readme-file', help='Path of the README.md')
   parser.add_option('--lib-java-dir', help='Directory containing java libs')
+  parser.add_option('--stamp', help='Path to touch on success.')
 
   options, _ = parser.parse_args()
   # A temporary directory to put the output of cronet api source jar files.
   unzipped_jar_path = tempfile.mkdtemp(dir=options.output_dir)
   if os.path.exists(options.input_src_jar):
     jar_cmd = ['jar', 'xf', os.path.abspath(options.input_src_jar)]
     build_utils.CheckOutput(jar_cmd, cwd=unzipped_jar_path)
   else:
     raise Exception('Jar file does not exist: %s' % options.input_src_jar)
 
   net_docs.ProcessDocs([options.readme_file], options.input_dir,
                        options.output_dir, extensions=[CronetExtension()])
 
   GenerateJavadoc(options, os.path.abspath(unzipped_jar_path))
 
+  if options.stamp:
+    build_utils.Touch(options.stamp)
   if options.depfile:
-    input_paths = []
+    assert options.stamp
+    deps = []
     for root, _, filenames in os.walk(options.input_dir):
-      input_paths.extend(os.path.join(root, f) for f in filenames)
-    build_utils.WriteDepfile(options.depfile,
-                             input_paths + build_utils.GetPythonDependencies())
+      deps.extend(os.path.join(root, f) for f in filenames)
+    build_utils.WriteDepfile(options.depfile, options.stamp, deps)
   # Clean up temporary output directory.
   build_utils.DeleteDirectory(unzipped_jar_path)
 
 if __name__ == '__main__':
   sys.exit(main())