Remove uses of std::unary_function and std::binary_function.

components/omnibox/browser/history_quick_provider_unittest.cc

Index: components/omnibox/browser/history_quick_provider_unittest.cc
diff --git a/components/omnibox/browser/history_quick_provider_unittest.cc b/components/omnibox/browser/history_quick_provider_unittest.cc
index da6abd40e27cfce13271691fc77e149592472e36..a5e19dd28285bbb0c9b501bc3073fc1c74bc024b 100644
--- a/components/omnibox/browser/history_quick_provider_unittest.cc
+++ b/components/omnibox/browser/history_quick_provider_unittest.cc
@@ -237,8 +237,7 @@ class HistoryQuickProviderTest : public testing::Test {
   HistoryQuickProviderTest() {}
 
  protected:
-  class SetShouldContain : public std::unary_function<const std::string&,
-                                                      std::set<std::string> > {
+  class SetShouldContain {
    public:
     explicit SetShouldContain(const ACMatches& matched_urls);