Add depfile support to android build scripts

build/android/gn/zip.py

Index: build/android/gn/zip.py
diff --git a/build/android/gn/zip.py b/build/android/gn/zip.py
index 4bd0adf0db1172b0b0d761f0ce634c7378e02871..5050ea07107d0afdcdfd273728447a614b4b5603 100755
--- a/build/android/gn/zip.py
+++ b/build/android/gn/zip.py
@@ -13,6 +13,9 @@ import os
 import sys
 import zipfile
 
+sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, 'gyp'))
+from util import build_utils
+
 def DoZip(inputs, output, base_dir):
   with zipfile.ZipFile(output, 'w') as outfile:
     for f in inputs:
@@ -20,6 +23,8 @@ def DoZip(inputs, output, base_dir):
 
 def main():
   parser = optparse.OptionParser()
+  build_utils.AddDepfileOption(parser)
+
   parser.add_option('--inputs', help='List of files to archive.')
   parser.add_option('--output', help='Path to output archive.')
   parser.add_option('--base-dir',
@@ -34,6 +39,11 @@ def main():
 
   DoZip(inputs, output, base_dir)
 
+  if options.depfile:
+    build_utils.WriteDepfile(
+        options.depfile,
+        build_utils.GetPythonDependencies())
+
 
 if __name__ == '__main__':
   sys.exit(main())