Add webkitpy platform support for Mac 10.10 Yosemite.

Tools/Scripts/webkitpy/layout_tests/port/builders.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 36 matching lines @@
     "WebKit Linux": {"port_name": "linux-x86_64", "specifiers": ['Linux', 'Release']},
     "WebKit Linux 32": {"port_name": "linux-x86", "specifiers": ['Linux', 'Release']},
     "WebKit Linux (dbg)": {"port_name": "linux-x86_64", "specifiers": ['Linux', 'Debug']},
     "WebKit Mac10.6": {"port_name": "mac-snowleopard", "specifiers": ['SnowLeopard', 'Release']},
     "WebKit Mac10.6 (dbg)": {"port_name": "mac-snowleopard", "specifiers": ['SnowLeopard', 'Debug']},
     "WebKit Mac10.7": {"port_name": "mac-lion", "specifiers": ['Lion', 'Release']},
     "WebKit Mac10.7 (dbg)": {"port_name": "mac-lion", "specifiers": ['Lion', 'Debug']},
     "WebKit Mac10.8": {"port_name": "mac-mountainlion", "specifiers": ['MountainLion', 'Release']},
     "WebKit Mac10.9 (retina)": {"port_name": "mac-retina", "specifiers": ['Retina', 'Release']},
     "WebKit Mac10.9": {"port_name": "mac-mavericks", "specifiers": ['Mavericks', 'Release']},
+    "WebKit Mac10.10": {"port_name": "mac-yosemite", "specifiers": ['Yosemite', 'Release']},
     "WebKit Android (Nexus4)": {"port_name": "android", "specifiers": ['Android', 'Release']},
 }
 
 
 # Mapping from port name to the deps builder of the same os:
 _deps_builders = {
     "linux-x86": "WebKit Linux (deps)",
     "linux-x86_64": "WebKit Linux (deps)",
     "win-xp": "WebKit XP (deps)",
     "win-win7": "WebKit XP (deps)",
@@ skipping 45 matching lines @@
                 return builder_name
     return debug_builder_name
 
 
 def builder_path_for_port_name(port_name):
     builder_path_from_name(builder_name_for_port_name(port_name))
 
 
 def deps_builder_name_for_port_name(target_port_name):
     return _deps_builders.get(target_port_name, None)