Prevent the user from hiding all Task Manager columns.
commit3fd35f5136965a7852f262e4cf4023dd6f91c038
authorshrike <shrike@chromium.org>
Tue, 8 Sep 2015 21:36:29 +0000 (8 14:36 -0700)
committerCommit bot <commit-bot@chromium.org>
Tue, 8 Sep 2015 21:37:19 +0000 (8 21:37 +0000)
tree899105410ded8d938da9e76ad31aedf836756008
parent34945a42ef3c869e868fb234bc83adeff5c0ad79
Prevent the user from hiding all Task Manager columns.

Currently it's possible to hide all of the columns in the Task Manager
table. The Task Manager is useless with zero visible columns, so this
change ensures that at least one column remains visible at all times.

BUG=518914

Review URL: https://codereview.chromium.org/1296693002

Cr-Commit-Position: refs/heads/master@{#347794}
chrome/browser/task_manager/task_manager.h
chrome/browser/ui/cocoa/task_manager_mac.mm
chrome/browser/ui/cocoa/task_manager_mac_unittest.mm