Replace webkitpy standalone builders functions with instantiable class.

third_party/WebKit/Tools/Scripts/webkitpy/common/host_mock.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 14 matching lines @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 from webkitpy.common.checkout.scm.scm_mock import MockSCM
 from webkitpy.common.net.buildbot.buildbot_mock import MockBuildBot
 from webkitpy.common.net.web_mock import MockWeb
 from webkitpy.common.system.systemhost_mock import MockSystemHost
 
 # New-style ports need to move down into webkitpy.common.
+from webkitpy.layout_tests.builders import Builders
 from webkitpy.layout_tests.port.factory import PortFactory
 from webkitpy.layout_tests.port.test import add_unit_tests_to_mock_filesystem
 
 
 class MockHost(MockSystemHost):
 
-    def __init__(self, log_executive=False, executive_throws_when_run=None, initialize_scm_by_default=True, web=None, scm=None):
-        MockSystemHost.__init__(self, log_executive, executive_throws_when_run)
+    def __init__(self, log_executive=False, executive_throws_when_run=None, initialize_scm_by_default=True, web=None, scm=None, os_name=None, os_version=None):
+        MockSystemHost.__init__(self, log_executive, executive_throws_when_run, os_name=os_name, os_version=os_version)
         add_unit_tests_to_mock_filesystem(self.filesystem)
         self.web = web or MockWeb()
 
         self._scm = scm
         # FIXME: we should never initialize the SCM by default, since the real
         # object doesn't either. This has caused at least one bug (see bug 89498).
         if initialize_scm_by_default:
             self.initialize_scm()
         self.buildbot = MockBuildBot()
 
         # Note: We're using a real PortFactory here.  Tests which don't wish to depend
         # on the list of known ports should override this with a MockPortFactory.
         self.port_factory = PortFactory(self)
 
+        self.builders = Builders()
+
     def initialize_scm(self, patch_directories=None):
         if not self._scm:
             self._scm = MockSCM(filesystem=self.filesystem, executive=self.executive)
         # Various pieces of code (wrongly) call filesystem.chdir(checkout_root).
         # Making the checkout_root exist in the mock filesystem makes that chdir not raise.
         self.filesystem.maybe_make_directory(self._scm.checkout_root)
 
     def scm(self):
         return self._scm
 
     def scm_for_path(self, path):
         # FIXME: consider supporting more than one SCM so that we can do more comprehensive testing.
         self.initialize_scm()
         return self._scm
 
     def checkout(self):
         return self._checkout