gn: Delete an unused function

BUG=315884
TBR=brettw

Review URL: https://codereview.chromium.org/66643005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234080 0039d316-1c4b-4281-b951-d872f2087c98
mac: Turn on -Wunused-functions.

BUG=315884
R=hans@chromium.org

Review URL: https://codereview.chromium.org/60803004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234081 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234080
Remove some uses of RootWindow in Ash.

Adds a window() accessor to RootWindow. This is redundant now but necessary for when RootWindow is no longer a RootWindow. A subsequent CL will sever that relationship.

R=sky@chromium.org
http://crbug.com/308843

Review URL: https://codereview.chromium.org/67083004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234082 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234082