Port cronet_package GYP target to GN

components/cronet/tools/jar_src.py

Index: components/cronet/tools/jar_src.py
diff --git a/components/cronet/tools/jar_src.py b/components/cronet/tools/jar_src.py
index 0cda4a894d8b8f25ebceb36cff9412cf589ad710..2b941d59e9837809989929ab90ac2340d6c5df22 100755
--- a/components/cronet/tools/jar_src.py
+++ b/components/cronet/tools/jar_src.py
@@ -32,6 +32,7 @@ def JarSources(src_dir, jar_path):
 
 def main():
   parser = optparse.OptionParser()
+  build_utils.AddDepfileOption(parser)
   parser.add_option('--src-dir', action="append",
       help='Directory containing .java files.')
   parser.add_option('--jar-path', help='Jar output path.')
@@ -39,13 +40,24 @@ def main():
 
   options, _ = parser.parse_args()
 
+  src_dirs = []
   for src_dir in options.src_dir:
+    src_dirs.extend(build_utils.ParseGypList(src_dir))
+
+  for src_dir in src_dirs:
     JarSources(src_dir, options.jar_path)
 
+  if options.depfile:
+    input_paths = []
+    for src_dir in src_dirs:
+      for root, _, filenames in os.walk(src_dir):
+        input_paths.extend(os.path.join(root, f) for f in filenames)
+    build_utils.WriteDepfile(options.depfile,
+                             input_paths + build_utils.GetPythonDependencies())
+
   if options.stamp:
     build_utils.Touch(options.stamp)
 
-
 if __name__ == '__main__':
   sys.exit(main())