GitLab

BUG=364141, 330264
TBR=jam@chromium.org for content/public/browser_plugin_guest_delegate code deletion.

Review URL: https://codereview.chromium.org/301303003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274002 0039d316-1c4b-4281-b951-d872f2087c98