Make the hint text black.


BUG=332074

Review URL: https://codereview.chromium.org/150473002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248034 0039d316-1c4b-4281-b951-d872f2087c98
When checking the public suffix list, set INCLUDE_PRIVATE_REGISTRIES for all security decisions.

For cookies, LSOs, site isolation, and renderer security decisions, also
consider domains on the PSL's private domains list, since the purpose
of the private domains is to set distinct security zones.

BUG=335902

Review URL: https://codereview.chromium.org/130623003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248035 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248035