[AiS] Remove answer contents from all matches other than the first.

components/omnibox/search_provider.h

Index: components/omnibox/search_provider.h
diff --git a/components/omnibox/search_provider.h b/components/omnibox/search_provider.h
index c8307c38db2663f36dc4fc8ee6a2bc38f7de96d6..12b921991ce6bc2dec39fa86a0a15b81992fdac6 100644
--- a/components/omnibox/search_provider.h
+++ b/components/omnibox/search_provider.h
@@ -11,6 +11,9 @@
 #ifndef COMPONENTS_OMNIBOX_SEARCH_PROVIDER_H_
 #define COMPONENTS_OMNIBOX_SEARCH_PROVIDER_H_
 
+#include <string>
+#include <vector>
+
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ -85,6 +88,7 @@ class SearchProvider : public BaseSearchProvider,
   FRIEND_TEST_ALL_PREFIXES(SearchProviderTest, SuggestQueryUsesToken);
   FRIEND_TEST_ALL_PREFIXES(SearchProviderTest, SessionToken);
   FRIEND_TEST_ALL_PREFIXES(SearchProviderTest, AnswersCache);
+  FRIEND_TEST_ALL_PREFIXES(SearchProviderTest, RemoveExtraAnswers);
   FRIEND_TEST_ALL_PREFIXES(AutocompleteProviderTest, GetDestinationURL);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedPrefetchTest, ClearPrefetchedResults);
   FRIEND_TEST_ALL_PREFIXES(InstantExtendedPrefetchTest, SetPrefetchQuery);
@@ -231,6 +235,10 @@ class SearchProvider : public BaseSearchProvider,
   // Converts the parsed results to a set of AutocompleteMatches, |matches_|.
   void ConvertResultsToAutocompleteMatches();
 
+  // Remove answer contents from each match in |matches| other than the first
+  // that appears.
+  static void RemoveExtraAnswers(ACMatches* matches);
+
   // Returns an iterator to the first match in |matches_| which might
   // be chosen as default.
   ACMatches::const_iterator FindTopMatch() const;