We should merge <https://src.chromium.org/viewvc/blink?view=rev&revision=195869>. Remove deprecated ContentSecurityPolicy methods Replace |ContentSecurityPolicy::deprecatedHeader| and |ContentSecurityPolicy::deprecatedHeaderType| with a single |headers| method returning a vector of headers. This allows callers to get all the CSP headers, not just the first one.
<rdar://problem/24383246>
Fixed this issue as part of the fix for bug #153157.