Add base::OptionalFromPtr to allowed blink usage.

Change-Id: I5eedd07b2e3d4b81b3fb573eb70bb543cf6965b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354591
Auto-Submit: Chris Hamilton <chrisha@chromium.org>
Commit-Queue: Chris Hamilton <chrisha@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@google.com>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Cr-Commit-Position: refs/heads/master@{#797764}

third_party/blink/tools/blinkpy/presubmit/audit_non_blink_usage.py

@@ -46,6 +46,7 @@ _CONFIG = [
             'base::Location',
             'base::MakeRefCounted',
             'base::Optional',
+            'base::OptionalFromPtr',
             'base::OptionalOrNullptr',
             'base::PlatformThread',
             'base::PlatformThreadId',