GitLab

Fix the problem that the minimized docked panel is not unsqueezed back to its original size when the restore button is clicked

The fix is to make Panel::OnRestoreButtonClicked call Panel::OnTitlebarClicked such that the logic provided in OnTitlebarClicked can take effect

BUG=244781
TEST=Manual test by following repro steps as in the bug

Review URL: https://chromiumcodereview.appspot.com/15807006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203022 0039d316-1c4b-4281-b951-d872f2087c98