[chromedriver] Pass in None in requestCrash

ChromeDriver python expecting pid in constructor

Bug: chromedriver:3681
Change-Id: Icb1e56720ca3c8231442628254f965d675df1696
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2592807Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Shengfa Lin <shengfa@google.com>
Cr-Commit-Position: refs/heads/master@{#837119}

chrome/test/chromedriver/client/chromedriver.py

@@ -364,7 +364,7 @@ class ChromeDriver(object):
     # Can't issue a new command without session_id
     if not hasattr(self, '_session_id') or self._session_id == None:
       return
-    tempDriver = ChromeDriver(self._server_url,
+    tempDriver = ChromeDriver(self._server_url, None,
       debugger_address=self.debuggerAddress, test_name='_forceCrash')
     try:
       tempDriver.SendCommandAndGetResult("Page.crash", {})