Add a class to parse answer json.

components/omnibox/autocomplete_match.h

 // Copyright 2014 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 COMPONENTS_OMNIBOX_AUTOCOMPLETE_MATCH_H_
 #define COMPONENTS_OMNIBOX_AUTOCOMPLETE_MATCH_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "components/omnibox/autocomplete_match_type.h"
 #include "components/search_engines/template_url.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 class AutocompleteProvider;
+class SuggestionAnswer;
 class TemplateURL;
 class TemplateURLService;
 
 namespace base {
 class Time;
 }  // namespace base
 
 const char kACMatchPropertyInputText[] = "input text";
 const char kACMatchPropertyContentsPrefix[] = "match contents prefix";
 const char kACMatchPropertyContentsStartIndex[] = "match contents start index";
@@ skipping 281 matching lines @@
   GURL stripped_destination_url;
 
   // The main text displayed in the address bar dropdown.
   base::string16 contents;
   ACMatchClassifications contents_class;
 
   // Additional helper text for each entry, such as a title or description.
   base::string16 description;
   ACMatchClassifications description_class;
 
+  // TODO(jdonnelly): Remove the first two properties once the downstream
+  // clients are using the SuggestionAnswer.
   // A rich-format version of the display for the dropdown.
   base::string16 answer_contents;
   base::string16 answer_type;
+  scoped_ptr<SuggestionAnswer> answer;
 
   // The transition type to use when the user opens this match.  By default
   // this is TYPED.  Providers whose matches do not look like URLs should set
   // it to GENERATED.
   ui::PageTransition transition;
 
   // True when this match is the "what you typed" match from the history
   // system.
   bool is_history_what_you_typed_match;
 
@@ skipping 47 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  // COMPONENTS_OMNIBOX_AUTOCOMPLETE_MATCH_H_