[Author: thomasvl]
[Author: thomasvl]

Make the test a little better at getting large data for future tweaks to
  the buffer size.

R=dmaclach

qwertme/google-toolbox-for-mac,qwertme/google-toolbox-for-mac,qwertme/google-toolbox-for-mac,jonreid/google-toolbox-for-mac,jonreid/google-toolbox-for-mac,jonreid/google-toolbox-for-mac