Added missing dependency to the agent logger unittests that fixes failing tests in coverage mode.
Added missing dependency to the agent logger unittests that fixes failing tests in coverage mode.

BUG=
R=sebmarchand@chromium.org

Review URL: https://codereview.appspot.com/195000043

Eloston/syzygy,wangming28/syzygy,supriyantomaftuh/syzygy,wangming28/syzygy,sebmarchand/syzygy,Eloston/syzygy,ericmckean/syzygy,pombreda/syzygy,sebmarchand/syzygy,google/syzygy,pombreda/syzygy,supriyantomaftuh/syzygy,google/syzygy,wangming28/syzygy,google/syzygy,sebmarchand/syzygy,supriyantomaftuh/syzygy,supriyantomaftuh/syzygy,ericmckean/syzygy,ericmckean/syzygy,wangming28/syzygy,google/syzygy,ericmckean/syzygy,sebmarchand/syzygy,sebmarchand/syzygy,pombreda/syzygy,pombreda/syzygy,pombreda/syzygy,ericmckean/syzygy