Remove TabContents from TabStripModelObserver::TabDetachedAt.

BUG=107201
TEST=no visible change


Review URL: https://chromiumcodereview.appspot.com/11293205

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@167122 0039d316-1c4b-4281-b951-d872f2087c98
void Browser::ToggleFullscreenModeForTab(WebContents* web_contents,
                                         bool enter_fullscreen) {
  fullscreen_controller_->ToggleFullscreenModeForTab(web_contents,
                                                     enter_fullscreen);
}

void Browser::ToggleFullscreenModeForTab(WebContents* web_contents,
                                         bool enter_fullscreen) {
  fullscreen_controller_->ToggleFullscreenModeForTab(web_contents,
                                                     enter_fullscreen);
}
