Update some uses of char16 to use the base:: namespace.

chrome/browser/autocomplete/autocomplete_match.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_MATCH_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_MATCH_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 61 matching lines @@
 
   // Type used by providers to attach additional, optional information to
   // an AutocompleteMatch.
   typedef std::map<std::string, std::string> AdditionalInfo;
 
   // The type of this match.
   typedef AutocompleteMatchType::Type Type;
 
   // Null-terminated array of characters that are not valid within |contents|
   // and |description| strings.
-  static const char16 kInvalidChars[];
+  static const base::char16 kInvalidChars[];
 
   AutocompleteMatch();
   AutocompleteMatch(AutocompleteProvider* provider,
                     int relevance,
                     bool deletable,
                     Type type);
   AutocompleteMatch(const AutocompleteMatch& match);
   ~AutocompleteMatch();
 
   // Converts |type| to a string representation.  Used in logging and debugging.
@@ skipping 253 matching lines @@
       const base::string16& text,
       const ACMatchClassifications& classifications) const;
 #endif
 };
 
 typedef AutocompleteMatch::ACMatchClassification ACMatchClassification;
 typedef std::vector<ACMatchClassification> ACMatchClassifications;
 typedef std::vector<AutocompleteMatch> ACMatches;
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_MATCH_H_