[Mac] Mark BrowserWindowController's window as non-restorable.
[Mac] Mark BrowserWindowController's window as non-restorable.

BUG=79113
TEST=On FutureCat, browse around for a few minutes, opening multiple tabs and switching applications. Try to quit Chromium. It quits.

Review URL: http://codereview.chromium.org/6971002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@84655 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,adobe/chromium,ropik/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium