[Author: thakis]
[Author: thakis]

Fix a harmless clang warning about the self-assignment

    duration = duration;

R=thomasvl
APPROVED=thomasvl
DELTA=6  (0 added, 1 deleted, 5 changed)
isongga/google-toolbox-for-mac,isongga/google-toolbox-for-mac,isongga/google-toolbox-for-mac