non-aura views: Remove some non-aura views code since they are now dead.

Detected the deadness when working on r249860.

BUG=none
R=sky@chromium.org

Review URL: https://codereview.chromium.org/151483009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250054 0039d316-1c4b-4281-b951-d872f2087c98
drive: Split AboutResourceLoader from ChangeListLoader

BUG=335469
TEST=unit_tests
R=kinaba@chromium.org

Review URL: https://codereview.chromium.org/158573003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250055 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250055