Mark http/tests/devtools/network/network-search.js timeout on Win7

Tbr: jarhar@chromium.org
No-Try: true
Bug: 942411
Change-Id: Ifc95e0747d9e8972c49007fc5f067c90da7b1571
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1544195
Reviewed-by: Ella Ge <eirage@chromium.org>
Commit-Queue: Ella Ge <eirage@chromium.org>
Cr-Commit-Position: refs/heads/master@{#645421}
1 file changed