Handle CreateFile() trimming trailing dots and spaces in downloads.

BUG=37007
TEST=unit_tests --gtest_filter=DownloadManagerTest.*

Review URL: http://codereview.chromium.org/660297

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40479 0039d316-1c4b-4281-b951-d872f2087c98
void SetExemplarSetForLang(const std::string& lang,
                           icu::UnicodeSet* lang_set) {
  LangToExemplarSetMap& map = Singleton<LangToExemplarSet>()->map;
  map.insert(std::make_pair(lang, lang_set));
}

void SetExemplarSetForLang(const std::string& lang,
                           icu::UnicodeSet* lang_set) {
  LangToExemplarSetMap& map = Singleton<LangToExemplarSet>()->map;
  map.insert(std::make_pair(lang, lang_set));
}
