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 BrowserTabStripController::InitFromModel(TabStrip* tabstrip) {
  tabstrip_ = tabstrip;

  UpdateLayoutType();

  for (int i = 0; i < model_->count(); ++i)
    AddTab(model_->GetWebContentsAt(i), i, model_->active_index() == i);
}

void BrowserTabStripController::InitFromModel(TabStrip* tabstrip) {
  tabstrip_ = tabstrip;

  UpdateLayoutType();

  for (int i = 0; i < model_->count(); ++i)
    AddTab(model_->GetWebContentsAt(i), i, model_->active_index() == i);
}
