Nukes dock info

Since tab dragging now does a native move loop we get docking for free (well, > win7 at least). If we want something for ash
we'll do that separately.

BUG=154076
TEST=none
R=ben@chromium.org

Review URL: https://codereview.chromium.org/165873006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252311 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252311
Remove the last ...OnUIThread method from drive::ResourceMetadata.

BUG=231222

Review URL: https://codereview.chromium.org/166293004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252312 0039d316-1c4b-4281-b951-d872f2087c98
raw_var_data: Fixed a tiny copy+paste error in a comment.

Review URL: https://codereview.chromium.org/170893007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252313 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252313