Convert IsSafeRedirectTarget and a couple throttles to work on UI thread

This converts a couple of the easy throttles that just needed to get
data from Profile instead of ProfileIOData, as well as converting
IsSafeRedirectTarget which now uses ExtensionRegistry instead of
extensions::InfoMap from ProfileIOData.

Bug: 824844, 976990
Change-Id: Iffb2ba970beeb4aacc0057b2f8ea6c6e0dd4b810
Commit-Queue: Clark DuVall <>
Reviewed-by: Bo <>
Reviewed-by: Kinuko Yasuda <>
Cr-Commit-Position: refs/heads/master@{#672239}
19 files changed