deps: V8: cherry-pick 35c6d4d

Original commit message:

    Make code generator python3.7 compatible (async keyword).

    Change-Id: Ifcd8b8cb1de60a007c7bbd4564d7869e83cb7109

Fixes: #29548
Refs:
- #29548 (comment)
- #29520
- #29340
- https://chromium-review.googlesource.com/c/deps/inspector_protocol/+/1781351
- https://chromium.googlesource.com/deps/inspector_protocol/+/35c6d4d0d80b42d81bd00bcb1eb2b1093c80ed0a

deps/v8/third_party/inspector_protocol/code_generator.py

@@ -43,6 +43,9 @@ def json_object_hook(object_dict):
       items = [(k, os.path.join(output_base, v) if k == "output" else v)
                for (k, v) in items]
       keys, values = list(zip(*items))
+      # 'async' is a keyword since Python 3.7.
+      # Avoid namedtuple(rename=True) for compatibility with Python 2.X.
+      keys = tuple('async_' if k == 'async' else k for k in keys)
       return collections.namedtuple('X', keys)(*values)
     return json.loads(data, object_hook=json_object_hook)
 
@@ -555,7 +558,7 @@ def is_async_command(self, domain, command):
     if not self.config.protocol.options:
       return False
     return self.check_options(self.config.protocol.options, domain, command,
-                              "async", None, False)
+                              "async_", None, False)
 
   def is_exported(self, domain, name):
     if not self.config.protocol.options: