We should consider merging <https://src.chromium.org/viewvc/blink?view=rev&revision=165466>. CSP: Improve blocked inline script error message. The message should make it clear that a lack of 'unsafe-inline' causes script/style to be blocked. This patch adds a sentence to that effect.
<rdar://problem/26522811>
We use our own wording for these kinds of violations, and do not think taking this specific change will benefit WebKit. Closing as NTBF.