Reinitialize BrowserManager's command queue after it is recreated (#4…

…9693)

* Reinitialize BrowserManager's command queue after it is recreated

This will allow init_failed message be sent back to TestRunnerManager if
timeout happens when start the browser.

Also set the start browser timeout value to 65 seconds to align with the
default browser startup timeout value.

Bug: 381944656

tools/wptrunner/wptrunner/browsers/chrome.py

@@ -206,6 +206,11 @@ def update_properties():
     return (["debug", "os", "processor"], {"os": ["version"], "processor": ["bits"]})
 
 class ChromeBrowser(WebDriverBrowser):
+
+    # Chrome browser's default startup timeout is 60 seconds. Use 65 seconds here
+    # to allow error message be displayed if that happens.
+    init_timeout: float = 65
+
     def __init__(self,
                  logger: StructuredLogger,
                  leak_check: bool = False,

tools/wptrunner/wptrunner/testrunner.py

@@ -994,7 +994,9 @@ def _ensure_runner_stopped(self):
             self.logger.debug("Recreating command queue")
             self.command_queue.cancel_join_thread()
             self.command_queue.close()
-            self.command_queue = mp.Queue()
+            # Reset the command queue for BrowserManager also as that won't
+            # be set again during retry.
+            self.browser.command_queue = self.command_queue = mp.Queue()
             self.logger.debug("Recreating remote queue")
             self.remote_queue.cancel_join_thread()
             self.remote_queue.close()