Fix cc_blink_unittests link errors in static GN builds after r377586.
Fix cc_blink_unittests link errors in static GN builds after r377586.

BUG=561879
TBR=yukishiino@chromium.org

Review URL: https://codereview.chromium.org/1737873002 .

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#377688}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk