Add google-endpoints to third_party/.

third_party/google-endpoints/_dummy_thread/__init__.py

Index: third_party/google-endpoints/_dummy_thread/__init__.py
diff --git a/third_party/google-endpoints/_dummy_thread/__init__.py b/third_party/google-endpoints/_dummy_thread/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..63dced6e5e572545413a21c7f139cadf80efe202
--- /dev/null
+++ b/third_party/google-endpoints/_dummy_thread/__init__.py
@@ -0,0 +1,10 @@
+from __future__ import absolute_import
+import sys
+__future_module__ = True
+
+if sys.version_info[0] < 3:
+    from dummy_thread import *
+else:
+    raise ImportError('This package should not be accessible on Python 3. '
+                      'Either you are trying to run from the python-future src folder '
+                      'or your installation of python-future is corrupted.')