Replace string16 with base::string16 in chrome/browser

TBR=sky

Review URL: https://codereview.chromium.org/108123004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240485 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/history/query_parser.h b/chrome/browser/history/query_parser.h
index 02f40f6..69d31db 100644
--- a/chrome/browser/history/query_parser.h
+++ b/chrome/browser/history/query_parser.h
@@ -77,7 +77,7 @@
   // "foo bar" results in two entries being added to words, one for foo and one
   // for bar.
   void ParseQueryWords(const base::string16& query,
-                       std::vector<string16>* words);
+                       std::vector<base::string16>* words);
 
   // Parses |query|, returning the nodes that constitute the valid words in the
   // query. This is intended for later usage with DoesQueryMatch. Ownership of