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 BrowserLauncherItemController::TabChangedAt(
    TabContents* tab,
    int index,
    TabStripModelObserver::TabChangeType change_type) {
  UpdateAppState(tab->web_contents());
  if (index != tab_model_->active_index() ||
      !(change_type != TabStripModelObserver::LOADING_ONLY &&
        change_type != TabStripModelObserver::TITLE_NOT_LOADING)) {
    return;
  }

  UpdateLauncher(tab);
}

 void BrowserLauncherItemController::TabChangedAt(
    TabContents* tab,
    int index,
    TabStripModelObserver::TabChangeType change_type) {
  UpdateAppState(tab->web_contents());
  if (index != tab_model_->active_index() ||
      !(change_type != TabStripModelObserver::LOADING_ONLY &&
        change_type != TabStripModelObserver::TITLE_NOT_LOADING)) {
    return;
  }

  UpdateLauncher(tab);
}
