Add ToString method for easy DLOG and debug support

chrome/common/custom_handlers/protocol_handler.h

 // Copyright (c) 2011 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_
 #pragma once
 
 #include <string>
 
@@ skipping 36 matching lines @@
   DictionaryValue* Encode() const;
 
   const std::string& protocol() const { return protocol_; }
   const GURL& url() const { return url_;}
   const 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);
   ProtocolHandler();
 
   std::string protocol_;
   GURL url_;
   string16 title_;
 };
 
 #endif  // CHROME_COMMON_CUSTOM_HANDLERS_PROTOCOL_HANDLER_H_