CSP 1.1: Implement the 'frame-ancestors' directive.

As defined at [1]. This patch will have no web-visible impact, as the directive
remains trapped behind the runtime flag that's governing all CSP 1.1 hotness.

[1]: http://w3c.github.io/webappsec/specs/content-security-policy/csp-specification.dev.html#frame-ancestors
BUG=129139,335489

Review URL: https://codereview.chromium.org/91353002

git-svn-id: svn://svn.chromium.org/blink/trunk@165629 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Rename [GenerateVisitDOMWrapper] to [SetWrapperReferenceFrom]

[GenerateVisitDOMWrapper] => [SetWrapperReferenceFrom]
[SetReference] => [SetWrapperReferenceTo]

because this is exactly what these IDL attributes are doing.

Review URL: https://codereview.chromium.org/143463013

git-svn-id: svn://svn.chromium.org/blink/trunk@165630 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: [JsDoc] Annotate @return types in profiler-related code

R=aandrey, eustas, loislo, yurys

Review URL: https://codereview.chromium.org/143323011

git-svn-id: svn://svn.chromium.org/blink/trunk@165631 bbb929c8-8fbe-4397-9dbb-9b2b20218538