Add google-endpoints to third_party/.

third_party/google-endpoints/libfuturize/fixes/fix_xrange_with_import.py

+"""
+For the ``future`` package.
+
+Turns any xrange calls into range calls and adds this import line:
+
+    from builtins import range
+
+at the top.
+"""
+
+from lib2to3.fixes.fix_xrange import FixXrange
+
+from libfuturize.fixer_util import touch_import_top
+
+
+class FixXrangeWithImport(FixXrange):
+    def transform(self, node, results):
+        result = super(FixXrangeWithImport, self).transform(node, results)
+        touch_import_top('builtins', 'range', node)
+        return result