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 AutomationProviderSearchEngineObserver::OnTemplateURLServiceChanged() {
  if (provider_) {
    TemplateURLService* url_service =
        TemplateURLServiceFactory::GetForProfile(profile_);
    url_service->RemoveObserver(this);
    AutomationJSONReply(provider_, reply_message_.release()).SendSuccess(NULL);
  }
  delete this;
}

void AutomationProviderSearchEngineObserver::OnTemplateURLServiceChanged() {
  if (provider_) {
    TemplateURLService* url_service =
        TemplateURLServiceFactory::GetForProfile(profile_);
    url_service->RemoveObserver(this);
    AutomationJSONReply(provider_, reply_message_.release()).SendSuccess(NULL);
  }
  delete this;
}
