GitLab

Add method getAllHeaders to get HttpUrlRequest response headers. It handles multiple headers with the same name.
For compatibility with HttpUrlConnection it includes Http status line as value for NULL key.

BUG=390267

Review URL: https://codereview.chromium.org/423163007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287597 0039d316-1c4b-4281-b951-d872f2087c98