Remove thirdparty/unittest2 from webkitpy and require python2.7.

Tools/Scripts/webkitpy/thirdparty/ordered_dict.py

-# Copyright (c) 2009 Raymond Hettinger.
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
-# This code is obtained from http://code.activestate.com/recipes/576669/
-
-from collections import MutableMapping
-
-class OrderedDict(dict, MutableMapping):
-
-    # Methods with direct access to underlying attributes
-
-    def __init__(self, *args, **kwds):
-        if len(args) > 1:
-            raise TypeError('expected at 1 argument, got %d', len(args))
-        if not hasattr(self, '_keys'):
-            self._keys = []
-        self.update(*args, **kwds)
-
-    def clear(self):
-        del self._keys[:]
-        dict.clear(self)
-
-    def __setitem__(self, key, value):
-        if key not in self:
-            self._keys.append(key)
-        dict.__setitem__(self, key, value)
-
-    def __delitem__(self, key):
-        dict.__delitem__(self, key)
-        self._keys.remove(key)
-
-    def __iter__(self):
-        return iter(self._keys)
-
-    def __reversed__(self):
-        return reversed(self._keys)
-
-    def popitem(self):
-        if not self:
-            raise KeyError
-        key = self._keys.pop()
-        value = dict.pop(self, key)
-        return key, value
-
-    def __reduce__(self):
-        items = [[k, self[k]] for k in self]
-        inst_dict = vars(self).copy()
-        inst_dict.pop('_keys', None)
-        return (self.__class__, (items,), inst_dict)
-
-    # Methods with indirect access via the above methods
-
-    setdefault = MutableMapping.setdefault
-    update = MutableMapping.update
-    pop = MutableMapping.pop
-    keys = MutableMapping.keys
-    values = MutableMapping.values
-    items = MutableMapping.items
-
-    def __repr__(self):
-        pairs = ', '.join(map('%r: %r'.__mod__, self.items()))
-        return '%s({%s})' % (self.__class__.__name__, pairs)
-
-    def copy(self):
-        return self.__class__(self)
-
-    @classmethod
-    def fromkeys(cls, iterable, value=None):
-        d = cls()
-        for key in iterable:
-            d[key] = value
-        return d