[autotest] Grab more chrome logs, not just the last one, to hedge against crashes

client/bin/site_login.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import errno, logging, os, re, utils, signal, subprocess, time
 from autotest_lib.client.bin import chromeos_constants, site_cryptohome
 from autotest_lib.client.bin import site_utils, test
 from autotest_lib.client.common_lib import error, log_watcher, site_ui
 
 _DEFAULT_TIMEOUT = 30
@@ skipping 276 matching lines @@
 
     Raises:
         UnexpectedCondition: called while already logged in
         TimeoutError: chrome didn't start before timeout
     """
     if logged_in():
         raise UnexpectedCondition('Already logged in')
     wait_for_browser()
     wait_for_login_prompt()
     oldpid = __get_session_manager_pid()
+
+    # Clear breadcrumb that shows we've emitted login-prompt-ready.
     try:
-      os.unlink(chromeos_constants.LOGIN_PROMPT_READY_MAGIC_FILE)
+        os.unlink(chromeos_constants.LOGIN_PROMPT_READY_MAGIC_FILE)
     except OSError, e:
-      if e.errno != errno.ENOENT:
-        raise e
+        if e.errno != errno.ENOENT:
+            raise e
+
+    # Clear old log files.
+    logpath = chromeos_constants.CHROME_LOG_DIR
+    try:
+        for file in os.listdir(logpath):
+            fullpath = os.path.join(logpath, file)
+            if os.path.isfile(fullpath):
+                os.unlink(os.path.join(logpath, file))

[rginda, 2010/09/09 21:01:31]

fullpath, no?

+
+    except (IOError, OSError) as error:
+        logging.error(error)
+
+    # Restart the UI.
     nuke_login_manager()
     site_utils.poll_for_condition(
         lambda: __session_manager_restarted(oldpid),
         TimeoutError('Timed out waiting for logout'),
         timeout)
     wait_for_login_prompt()