[blink] Make TextForInspector check a DCHECK

This CHECK is currently occasionally failing in the wild, but the failure
of the CHECK doesn't mean any serious correctness issues. Make it a
DCHECK for now to prevent crashes, and investigate separately.

Bug: 865098
Bug: 899217
Bug: 909858
Change-Id: Ie99a1e79bd239ac01021e1d942724cf3bdfdd510
Reviewed-on: https://chromium-review.googlesource.com/c/1353955
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611972}
1 file changed