Add public page loading performance tests using web-page-replay

Add public page loading performance tests using web-page-replay
https://bugs.webkit.org/show_bug.cgi?id=84008

Reviewed by Dirk Pranke.

PerformanceTests:

Add replay tests for google.com and youtube.com as examples.

* Replay: Added.
* Replay/www.google.com.replay: Added.
* Replay/www.youtube.com.replay: Added.

Tools:

Add the primitive implementation of replay performance tests. We use web-page-replay (http://code.google.com/p/web-page-replay/)
to cache data locally. Each replay test is represented by a text file with .replay extension containing a single URL.
To hash out bugs and isolate them from the rest of performance tests, replay tests are hidden behind --replay flag.

Run "run-perf-tests --replay PerformanceTests/Replay" after changing the system network preference to forward HTTP and HTTPS requests
to localhost:8080 and localhost:8443 respectively (i.e. configure the system as if there are HTTP proxies at ports 8080 and 8443)
excluding: *.webkit.org, *.googlecode.com, *.sourceforge.net, pypi.python.org, and www.adambarth.com for thirdparty Python dependencies.
run-perf-tests starts web-page-replay, which provides HTTP proxies at ports 8080 and 8443 to replay pages.

* Scripts/webkitpy/layout_tests/port/driver.py:
(Driver.is_external_http_test): Added.
* Scripts/webkitpy/layout_tests/port/webkit.py:
(WebKitDriver._command_from_driver_input): Allow test names that starts with http:// or https://.
* Scripts/webkitpy/performance_tests/perftest.py:
(PerfTest.__init__): Takes port.
(PerfTest.prepare): Added. Overridden by ReplayPerfTest.
(PerfTest):
(PerfTest.run): Calls run_single.
(PerfTest.run_single): Extracted from PageLoadingPerfTest.run.
(ChromiumStylePerfTest.__init__):
(PageLoadingPerfTest.__init__):
(PageLoadingPerfTest.run):
(ReplayServer): Added. Responsible for starting and stopping replay.py in the web-page-replay.
(ReplayServer.__init__):
(ReplayServer.wait_until_ready): Wait until port 8080 is ready. I have tried looking at the piped output from web-page-replay
but it caused a dead lock on some web pages.
(ReplayServer.stop):
(ReplayServer.__del__):
(ReplayPerfTest):
(ReplayPerfTest.__init__):
(ReplayPerfTest._start_replay_server):
(ReplayPerfTest.prepare): Creates test.wpr and test-expected.png to cache the page when a replay test is ran for the first time.
The subsequent runs of the same test will just use test.wpr.
(ReplayPerfTest.run_single):
(PerfTestFactory):
(PerfTestFactory.create_perf_test):
* Scripts/webkitpy/performance_tests/perftest_unittest.py:
(MainTest.test_parse_output):
(MainTest.test_parse_output_with_failing_line):
(TestPageLoadingPerfTest.test_run):
(TestPageLoadingPerfTest.test_run_with_bad_output):
(TestReplayPerfTest):
(TestReplayPerfTest.ReplayTestPort):
(TestReplayPerfTest.ReplayTestPort.__init__):
(TestReplayPerfTest.ReplayTestPort.__init__.ReplayTestDriver):
(TestReplayPerfTest.ReplayTestPort.__init__.ReplayTestDriver.run_test):
(TestReplayPerfTest.ReplayTestPort._driver_class):
(TestReplayPerfTest.MockReplayServer):
(TestReplayPerfTest.MockReplayServer.__init__):
(TestReplayPerfTest.MockReplayServer.stop):
(TestReplayPerfTest._add_file):
(TestReplayPerfTest._setup_test):
(TestReplayPerfTest.test_run_single):
(TestReplayPerfTest.test_run_single.run_test):
(TestReplayPerfTest.test_run_single_fails_without_webpagereplay):
(TestReplayPerfTest.test_prepare_fails_when_wait_until_ready_fails):
(TestReplayPerfTest.test_run_single_fails_when_output_has_error):
(TestReplayPerfTest.test_run_single_fails_when_output_has_error.run_test):
(TestReplayPerfTest.test_prepare):
(TestReplayPerfTest.test_prepare.run_test):
(TestReplayPerfTest.test_prepare_calls_run_single):
(TestReplayPerfTest.test_prepare_calls_run_single.run_single):
(TestPerfTestFactory.test_regular_test):
(TestPerfTestFactory.test_inspector_test):
(TestPerfTestFactory.test_page_loading_test):
* Scripts/webkitpy/performance_tests/perftestsrunner.py:
(PerfTestsRunner):
(PerfTestsRunner._parse_args): Added --replay flag to enable replay tests.
(PerfTestsRunner._collect_tests): Collect .replay files when replay tests are enabled.
(PerfTestsRunner._collect_tests._is_test_file):
(PerfTestsRunner.run): Exit early if one of calls to prepare() fails.
* Scripts/webkitpy/performance_tests/perftestsrunner_unittest.py:
(create_runner):
(run_test):
(_tests_for_runner):
(test_run_test_set):
(test_run_test_set_kills_drt_per_run):
(test_run_test_pause_before_testing):
(test_run_test_set_for_parser_tests):
(test_run_test_set_with_json_output):
(test_run_test_set_with_json_source):
(test_run_test_set_with_multiple_repositories):
(test_run_with_upload_json):
(test_upload_json):
(test_upload_json.MockFileUploader.upload_single_text_file):
(_add_file):
(test_collect_tests):
(test_collect_tests_with_multile_files):
(test_collect_tests_with_multile_files.add_file):
(test_collect_tests_with_skipped_list):
(test_collect_tests_with_page_load_svg):
(test_collect_tests_should_ignore_replay_tests_by_default):
(test_collect_tests_with_replay_tests):
(test_parse_args):
* Scripts/webkitpy/thirdparty/__init__.py: Added the dependency for web-page-replay version 1.1.1.
(AutoinstallImportHook.find_module):
(AutoinstallImportHook._install_webpagereplay):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@119188 268f45cc-cd09-0410-ab3c-d52691b4dbfc