https://bugs.webkit.org/show_bug.cgi?id=76764

Reviewed by Dirk Pranke.

Move skipped_perf_tests from WebKit port to Base port so that Chromium port
can also find skipped list. Chromium port only uses test_expectations.txt for
layout tests but performacne tests don't use test_expectations.txt so Chromium port
also needs to use Skipped list.

* Scripts/webkitpy/layout_tests/port/base.py:
(Port._tests_from_skipped_file_contents):
(Port):
(Port._expectations_from_skipped_files):
(Port.skipped_perf_tests):
* Scripts/webkitpy/layout_tests/port/base_unittest.py:
(PortTest.test_skipped_perf_tests):
(PortTest.test_skipped_perf_tests.add_text_file):
* Scripts/webkitpy/layout_tests/port/webkit.py:
(WebKitPort._skipped_tests_for_unsupported_features):
(WebKitPort._skipped_file_search_paths):
(WebKitPort.skipped_layout_tests):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105644 268f45cc-cd09-0410-ab3c-d52691b4dbfc