[Findit] Add three sub-pipelines to analyze build failure.

appengine/findit/waterfall/extractor.py

Index: appengine/findit/waterfall/extractor.py
diff --git a/appengine/findit/waterfall/extractor.py b/appengine/findit/waterfall/extractor.py
index 1c30acfb4894aa3f7d41ed8ee50cf0d697442168..81de3d56b4b2c17e11a65ba19ec5a06ec46626ff 100644
--- a/appengine/findit/waterfall/extractor.py
+++ b/appengine/findit/waterfall/extractor.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2014 The Chromium Authors. All rights reserved.
+# 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.
 
@@ -13,7 +13,9 @@ class Extractor(object):
     match = extractor_util.PYTHON_STACK_TRACE_PATTERN.match(message_line)
     if match:
       trace_line = match.groupdict()
-      failure_signal.AddFile(trace_line['file'], trace_line['line'])
+      failure_signal.AddFile(
+          extractor_util.NormalizeFilePath(trace_line['file']),
+          trace_line['line'])
     else:
       for match in extractor_util.FILE_PATH_LINE_PATTERN.finditer(message_line):
         file_path, line_number = match.groups()