DevTools: relax the check when looking up the shared workers' agent hosts.

BUG=559310

Review URL: https://codereview.chromium.org/1473853002

Cr-Commit-Position: refs/heads/master@{#361556}
(cherry picked from commit 3f1bf682566dfcf478d5f0d841f65d27b849e643)

Review URL: https://codereview.chromium.org/1492123006 .

Cr-Commit-Position: refs/branch-heads/2564@{#221}
Cr-Branched-From: 1283eca15bd9f772387f75241576cde7bdec7f54-refs/heads/master@{#359700}
1 file changed