Fix broken GN build.
Fix broken GN build.

Compiler complains about two '>>' for the templates.

BUG=461222
TBR=lionel.g.landwerlin@intel.com

Review URL: https://codereview.chromium.org/1464513002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#360605}

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