Adding `content_security_policy` to Speech Input API sample.

As a drive-by, this CL also regenerates the `experimental.settings` docs, which someone apparently forgot to do after committing. :)

BUG=92644
TEST=

Review URL: http://codereview.chromium.org/8698003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111588 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed