Componentize TemplateURLFetcher

chrome/browser/search_engines/template_url_parser.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_SEARCH_ENGINES_TEMPLATE_URL_PARSER_H_
-#define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_PARSER_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-
-class SearchTermsData;
-class TemplateURL;
-
-// TemplateURLParser, as the name implies, handling reading of TemplateURLs
-// from OpenSearch description documents.
-class TemplateURLParser {
- public:
-  class ParameterFilter {
-   public:
-    // Invoked for each parameter of the template URL while parsing.  If this
-    // methods returns false, the parameter is not included.
-    virtual bool KeepParameter(const std::string& key,
-                               const std::string& value) = 0;
-
-   protected:
-    virtual ~ParameterFilter() {}
-  };
-
-  // Decodes the chunk of data representing a TemplateURL, creates the
-  // TemplateURL, and returns it.  The caller owns the returned object.
-  // Returns NULL if data does not describe a valid TemplateURL, the
-  // URLs referenced do not point to valid http/https resources, or for some
-  // other reason we do not support the described TemplateURL.
-  // |parameter_filter| can be used if you want to filter some parameters out of
-  // the URL.  For example, when importing from another browser, we remove any
-  // parameter identifying that browser.  If set to NULL, the URL is not
-  // modified.
-  static TemplateURL* Parse(const SearchTermsData& search_terms_data,
-                            bool show_in_default_list,
-                            const char* data,
-                            size_t length,
-                            ParameterFilter* parameter_filter);
-
- private:
-  // No one should create one of these.
-  TemplateURLParser();
-
-  DISALLOW_COPY_AND_ASSIGN(TemplateURLParser);
-};
-
-#endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_PARSER_H_