Make update-flaky-tests work for debug builders as well.

Tools/Scripts/webkitpy/tool/commands/flakytests_unittest.py

 # Copyright 2014 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.
 
 from webkitpy.tool.commands.commandtest import CommandsTest
 from webkitpy.tool.mocktool import MockTool, MockOptions
 
 import flakytests
 
 
 class FakeBotTestExpectations(object):
     def expectation_lines(self, only_ignore_very_flaky=False):
         return []
 
 
 class FakeBotTestExpectationsFactory(object):
-    def expectations_for_port(self, port_name):
+    def expectations_for_builder(self, builder):
         return FakeBotTestExpectations()
 
 
 class FlakyTestsTest(CommandsTest):
     def test_simple(self):
         command = flakytests.FlakyTests()
         factory = FakeBotTestExpectationsFactory()
         lines = command._collect_expectation_lines(['foo'], factory)
         self.assertEqual(lines, [])
 
     def test_integration(self):
         command = flakytests.FlakyTests()
         command.expectations_factory = FakeBotTestExpectationsFactory
         options = MockOptions(upload=True)
         expected_stdout = """Updated /mock-checkout/third_party/WebKit/LayoutTests/FlakyTests
 LayoutTests/FlakyTests is not changed, not uploading.
 """
         self.assert_execute_outputs(command, options=options, expected_stdout=expected_stdout)