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
TabStripGtk::~TabStripGtk() {
  model_->RemoveObserver(this);
  tabstrip_.Destroy();

  std::vector<TabData>::iterator iterator = tab_data_.begin();
  for (; iterator < tab_data_.end(); iterator++) {
    delete iterator->tab;
  }

  tab_data_.clear();

  RemoveMessageLoopObserver();
}

TabStripGtk::~TabStripGtk() {
  model_->RemoveObserver(this);
  tabstrip_.Destroy();

  std::vector<TabData>::iterator iterator = tab_data_.begin();
  for (; iterator < tab_data_.end(); iterator++) {
    delete iterator->tab;
  }

  tab_data_.clear();

  RemoveMessageLoopObserver();
}
