GitLab

Clean up comments on SupportsUserData.
Fix typos in ResourceContextImpl.
Remove use of PropertyBag from ExtensionService as it hasn't been used since r135419.
Remove use of PropertyBag from RenderWidgetHostImpl as it hasn't been used since r83122.

BUG=141177
TEST=none


Review URL: https://chromiumcodereview.appspot.com/10824342

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152421 0039d316-1c4b-4281-b951-d872f2087c98