Revert "[Android] Add context manager to record logcat during step(s)."

scripts/slave/recipes/android_webview_shell_tests.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Recipe for running SystemWebViewShell instrumentation layout tests using
 system WebView.
 """
 
 from recipe_engine.types import freeze
@@ skipping 70 matching lines @@
   # Install system WebView shell
   api.chromium_android.adb_install_apk(WEBVIEW_SHELL_APK)
 
   api.adb.list_devices()
 
   # Run the instrumentation tests from the package.
   with api.step.defer_results():
     for suite in INSTRUMENTATION_TESTS:
       run_instrumentation_test(api, suite)
 
-    logcat_file = api.chromium.output_dir.join('full_logcat')
-    api.chromium_android.logcat_dump(output_logcat_file=logcat_file)
-    api.chromium_android.stack_tool_steps(logcat_file=logcat_file)
+    api.chromium_android.logcat_dump()
+    api.chromium_android.stack_tool_steps()
     api.chromium_android.test_report()
 
 def run_instrumentation_test(api, suite):
   mock_test_results = {
     'per_iteration_data': [{'TestA': [{'status': 'SUCCESS'}]},
                            {'TestB': [{'status': 'FAILURE'}]}]
   }
   try:
     json_results_file = api.json.output(add_json_log=False)
     api.chromium_android.run_instrumentation_suite(
@@ skipping 20 matching lines @@
 
 def GenTests(api):
   yield (api.test('basic') +
       api.properties.scheduled())
 
   yield (
       api.test('test_failure') +
       api.properties.scheduled() +
       api.step_data(
           'Instrumentation test SystemWebViewShellLayoutTest', retcode=1))