mojo/common: Decouple GURL dependency

mojo/common/common_type_converters.h

 // Copyright 2013 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 MOJO_COMMON_COMMON_TYPE_CONVERTERS_H_
 #define MOJO_COMMON_COMMON_TYPE_CONVERTERS_H_
 
 #include "base/strings/string16.h"
 #include "base/strings/string_piece.h"
 #include "mojo/common/mojo_common_export.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/array.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/string.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/type_converter.h"
 
-class GURL;
-
 namespace mojo {
 
 template <>
 struct MOJO_COMMON_EXPORT TypeConverter<String, base::StringPiece> {
   static String Convert(const base::StringPiece& input);
 };
 
 template <>
 struct MOJO_COMMON_EXPORT TypeConverter<base::StringPiece, String> {
   static base::StringPiece Convert(const String& input);
 };
 
 template <>
 struct MOJO_COMMON_EXPORT TypeConverter<String, base::string16> {
   static String Convert(const base::string16& input);
 };
 
 template <>
 struct MOJO_COMMON_EXPORT TypeConverter<base::string16, String> {
   static base::string16 Convert(const String& input);
 };
 
-template <>
-struct MOJO_COMMON_EXPORT TypeConverter<String, GURL> {
-  static String Convert(const GURL& input);
-};
-
-template <>
-struct MOJO_COMMON_EXPORT TypeConverter<GURL, String> {
-  static GURL Convert(const String& input);
-};
-
 // TODO(erg): In the very long term, we will want to remove conversion between
 // std::strings and arrays of unsigned bytes. However, there is too much code
 // across chrome which uses std::string as a bag of bytes that we probably
 // don't want to roll this function at each callsite.
 template <>
 struct MOJO_COMMON_EXPORT TypeConverter<std::string, Array<uint8_t> > {
   static std::string Convert(const Array<uint8_t>& input);
 };
 
 template <>
 struct MOJO_COMMON_EXPORT TypeConverter<Array<uint8_t>, std::string> {
   static Array<uint8_t> Convert(const std::string& input);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_COMMON_COMMON_TYPE_CONVERTERS_H_