Make test_results deployable again.

appengine/path_mangler_hack.py

+# 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.
+
+import sys
+
+# App Engine source file imports must be relative to their app's root.
+# Provide a way to mangle sys.path, but not leave it littered with junk.
+
+# TODO(ojan): This is a stopgap. Come up with a more general solution.
+
+# pylint: disable=W0702
+
+class PathMangler:
+  def __init__(self, root):
+    self.app_root = root
+
+  def __enter__(self):
+    sys.path.append(self.app_root)
+
+    try:
+      import model
+      reload(model)
+    except:
+      pass
+
+    try:
+      import handlers
+      reload(handlers)
+    except:
+      pass
+
+  def __exit__(self, etype, value, etraceback):
+    sys.path.remove(self.app_root)