Add explicit base namespace to string16 users.

chrome/common/custom_handlers/protocol_handler.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_COMMON_CUSTOM_HANDLERS_PROTOCOL_HANDLER_H_
 #define CHROME_COMMON_CUSTOM_HANDLERS_PROTOCOL_HANDLER_H_
 
 #include <string>
 
 #include "base/values.h"
 #include "url/gurl.h"
 
 // A single tuple of (protocol, url, title) that indicates how URLs of the
 // given protocol should be rewritten to be handled.
 
 class ProtocolHandler {
  public:
   static ProtocolHandler CreateProtocolHandler(const std::string& protocol,
                                                const GURL& url,
-                                               const string16& title);
+                                               const base::string16& title);
 
   // Creates a ProtocolHandler with fields from the dictionary. Returns an
   // empty ProtocolHandler if the input is invalid.
   static ProtocolHandler CreateProtocolHandler(
       const base::DictionaryValue* value);
 
   // Returns true if the dictionary value has all the necessary fields to
   // define a ProtocolHandler.
   static bool IsValidDict(const base::DictionaryValue* value);
 
@@ skipping 10 matching lines @@
   // if both handlers can be registered, or if a handler has previously been
   // ignored.
   bool IsEquivalent(const ProtocolHandler& other) const;
 
   // Encodes this protocol handler as a DictionaryValue. The caller is
   // responsible for deleting the returned value.
   base::DictionaryValue* Encode() const;
 
   const std::string& protocol() const { return protocol_; }
   const GURL& url() const { return url_;}
-  const string16& title() const { return title_; }
+  const base::string16& title() const { return title_; }
 
   bool IsEmpty() const {
     return protocol_.empty();
   }
 
 #if !defined(NDEBUG)
   // Returns a string representation suitable for use in debugging.
   std::string ToString() const;
 #endif
 
 
   bool operator==(const ProtocolHandler& other) const;
   bool operator<(const ProtocolHandler& other) const;
 
  private:
   ProtocolHandler(const std::string& protocol,
                   const GURL& url,
-                  const string16& title);
+                  const base::string16& title);
   ProtocolHandler();
 
   std::string protocol_;
   GURL url_;
-  string16 title_;
+  base::string16 title_;
 };
 
 #endif  // CHROME_COMMON_CUSTOM_HANDLERS_PROTOCOL_HANDLER_H_