Fix references to browser_common in test runner (#25742)

Author: juj

test/runner.py

@@ -584,13 +584,13 @@ def set_env(name, option_value):
   utils.delete_file(browser_common.browser_spawn_lock_filename)
   utils.delete_file(f'{browser_common.browser_spawn_lock_filename}_counter')
   if options.force_browser_process_termination or os.getenv('EMTEST_FORCE_BROWSER_PROCESS_TERMINATION'):
-    config = common.get_browser_config()
+    config = browser_common.get_browser_config()
 
     def terminate_all_browser_processes():
-      procs = common.list_processes_by_name(config.executable_name)
+      procs = browser_common.list_processes_by_name(config.executable_name)
       if len(procs) > 0:
         print(f'Terminating {len(procs)} stray browser processes.')
-        common.terminate_list_of_processes(procs)
+        browser_common.terminate_list_of_processes(procs)
 
     if config and hasattr(config, 'executable_name'):
       atexit.register(terminate_all_browser_processes)