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/omnibox/suggestion_answer.h"
 #include "components/search_engines/template_url.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 class AutocompleteProvider;
 class TemplateURL;
 class TemplateURLService;
 
 namespace base {
 class Time;
@@ skipping 286 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.

[Peter Kasting, 2014/10/24 22:38:09]

Does this just mean chrome/ code?  Is it not possible to change this all at
once, or were just trying to keep the change smaller and more reviewable? 
(Which I'm fine with)

[Justin Donnelly, 2014/10/27 21:41:15]

Yeah, I'd probably do it just to keep the change size manageable but the driving
reason is that Clank (and maybe Bling?) rolls the main repository to their build
periodically, so the changes have to be staged.

   // A rich-format version of the display for the dropdown.
   base::string16 answer_contents;
   base::string16 answer_type;
+  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_