Use underscores to separate words in filenames in webkitpy.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/system_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 12 matching lines @@
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # 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 StringIO import StringIO
 
 from webkitpy.common.system.executive_mock import MockExecutive
 from webkitpy.common.system.filesystem_mock import MockFileSystem
-from webkitpy.common.system.platforminfo_mock import MockPlatformInfo
+from webkitpy.common.system.platform_info_mock import MockPlatformInfo
 from webkitpy.common.system.user_mock import MockUser
 from webkitpy.common.system.workspace_mock import MockWorkspace
 
 
 class MockSystemHost(object):
 
     def __init__(self, log_executive=False, executive_throws_when_run=None, os_name=None,
                  os_version=None, executive=None, filesystem=None, time_return_val=123):
         self.executable = 'python'
         self.executive = executive or MockExecutive(should_log=log_executive, should_throw_when_run=executive_throws_when_run)
@@ skipping 18 matching lines @@
         self.time_return_val = time_return_val
 
     def time(self):
         return self.time_return_val
 
     def print_(self, *args, **kwargs):
         sep = kwargs.get('sep', ' ')
         end = kwargs.get('end', '\n')
         stream = kwargs.get('stream', self.stdout)
         stream.write(sep.join([str(arg) for arg in args]) + end)