Port cronet_package GYP target to GN

components/cronet/tools/extract_from_jars.py

Index: components/cronet/tools/extract_from_jars.py
diff --git a/components/cronet/tools/extract_from_jars.py b/components/cronet/tools/extract_from_jars.py
index d72d46c162b1f2bce77cbb7a478e6b3f7e919d34..73931cdefb68d31d6348854164e7399c2dc2110e 100755
--- a/components/cronet/tools/extract_from_jars.py
+++ b/components/cronet/tools/extract_from_jars.py
@@ -31,6 +31,7 @@ def ExtractJars(options):
 
 def main():
   parser = optparse.OptionParser()
+  build_utils.AddDepfileOption(parser)
   parser.add_option('--classes-dir', help='Directory to extract .class files.')
   parser.add_option('--jars', help='Paths to jars to extract.')
   parser.add_option('--stamp', help='Path to touch on success.')
@@ -39,6 +40,10 @@ def main():
 
   ExtractJars(options)
 
+  if options.depfile:
+    build_utils.WriteDepfile(options.depfile,
+                             build_utils.GetPythonDependencies())
+
   if options.stamp:
     build_utils.Touch(options.stamp)