Optimizing HQP using vectors manually. This is just a CL to be able

components/omnibox/browser/in_memory_url_index_types.h

Index: components/omnibox/browser/in_memory_url_index_types.h
diff --git a/components/omnibox/browser/in_memory_url_index_types.h b/components/omnibox/browser/in_memory_url_index_types.h
index 070ba43bf621896e2bdf4c18ec71ead2678ff4b0..e3e16d0a90d558b5f6d9e39beade6ac85b27b02e 100644
--- a/components/omnibox/browser/in_memory_url_index_types.h
+++ b/components/omnibox/browser/in_memory_url_index_types.h
@@ -132,6 +132,7 @@ typedef std::map<base::string16, WordID> WordMap;
 
 // A map from character to the word_ids of words containing that character.
 typedef std::set<WordID> WordIDSet;  // An index into the WordList.
+typedef std::vector<WordID> WordIDVector;
 typedef std::map<base::char16, WordIDSet> CharWordIDMap;
 
 // A map from word (by word_id) to history items containing that word.