Add a class to parse answer json.

components/omnibox/search_provider.cc

 // Copyright 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.
 
 #include "components/omnibox/search_provider.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/base64.h"
@@ skipping 805 matching lines @@
   const TemplateURL* keyword_url = providers_.GetKeywordProviderURL();
   if (verbatim_relevance > 0) {
     const base::string16& trimmed_verbatim =
         base::CollapseWhitespace(input_.text(), false);
 
     // Verbatim results don't get suggestions and hence, answers.
     // Scan previous matches if the last answer-bearing suggestion matches
     // verbatim, and if so, copy over answer contents.
     base::string16 answer_contents;
     base::string16 answer_type;
+    scoped_ptr<SuggestionAnswer> answer;
     for (ACMatches::iterator it = matches_.begin(); it != matches_.end();
          ++it) {
       if (!it->answer_contents.empty() &&
           it->fill_into_edit == trimmed_verbatim) {
         answer_contents = it->answer_contents;
         answer_type = it->answer_type;
+        answer.reset(it->answer.get() ?
+            new SuggestionAnswer(*it->answer) : nullptr);
         break;
       }
     }
 
     SearchSuggestionParser::SuggestResult verbatim(
         trimmed_verbatim, AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED,
         trimmed_verbatim, base::string16(), base::string16(), answer_contents,
-        answer_type, std::string(), std::string(), false, verbatim_relevance,
-        relevance_from_server, false, trimmed_verbatim);
+        answer_type, answer.Pass(), std::string(), std::string(), false,
+        verbatim_relevance, relevance_from_server, false, trimmed_verbatim);
     AddMatchToMap(verbatim, std::string(), did_not_accept_default_suggestion,
                   false, keyword_url != NULL, &map);
   }
   if (!keyword_input_.text().empty()) {
     // We only create the verbatim search query match for a keyword
     // if it's not an extension keyword.  Extension keywords are handled
     // in KeywordProvider::Start().  (Extensions are complicated...)
     // Note: in this provider, SEARCH_OTHER_ENGINE must correspond
     // to the keyword verbatim search query.  Do not create other matches
     // of type SEARCH_OTHER_ENGINE.
     if (keyword_url &&
         (keyword_url->GetType() != TemplateURL::OMNIBOX_API_EXTENSION)) {
       bool keyword_relevance_from_server;
       const int keyword_verbatim_relevance =
           GetKeywordVerbatimRelevance(&keyword_relevance_from_server);
       if (keyword_verbatim_relevance > 0) {
         const base::string16& trimmed_verbatim =
             base::CollapseWhitespace(keyword_input_.text(), false);
         SearchSuggestionParser::SuggestResult verbatim(
             trimmed_verbatim, AutocompleteMatchType::SEARCH_OTHER_ENGINE,
             trimmed_verbatim, base::string16(), base::string16(),
-            base::string16(), base::string16(), std::string(), std::string(),
-            true, keyword_verbatim_relevance, keyword_relevance_from_server,
-            false, trimmed_verbatim);
+            base::string16(), base::string16(), nullptr, std::string(),
+            std::string(), true, keyword_verbatim_relevance,
+            keyword_relevance_from_server, false, trimmed_verbatim);
         AddMatchToMap(verbatim, std::string(),
                       did_not_accept_keyword_suggestion, false, true, &map);
       }
     }
   }
   AddRawHistoryResultsToMap(true, did_not_accept_keyword_suggestion, &map);
   AddRawHistoryResultsToMap(false, did_not_accept_default_suggestion, &map);
 
   AddSuggestResultsToMap(keyword_results_.suggest_results,
                          keyword_results_.metadata, &map);
@@ skipping 59 matching lines @@
 
     matches_.push_back(*i);
   }
   UMA_HISTOGRAM_TIMES("Omnibox.SearchProvider.ConvertResultsTime",
                       base::TimeTicks::Now() - start_time);
 }
 
 void SearchProvider::RemoveExtraAnswers(ACMatches* matches) {
   bool answer_seen = false;
   for (ACMatches::iterator it = matches->begin(); it != matches->end(); ++it) {
-    if (!it->answer_contents.empty()) {
+    if (!it->answer.get()) {
       if (!answer_seen) {
         answer_seen = true;
       } else {
         it->answer_contents.clear();
         it->answer_type.clear();
+        it->answer.reset();
       }
     }
   }
 }
 
 ACMatches::const_iterator SearchProvider::FindTopMatch() const {
   ACMatches::const_iterator it = matches_.begin();
   while ((it != matches_.end()) && !it->allowed_to_be_default_match)
     ++it;
   return it;
@@ skipping 98 matching lines @@
     // typed match to always be first.
     SearchSuggestionParser::SuggestResults::iterator insertion_position =
         scored_results.end();
     if (trimmed_suggestion == trimmed_input) {
       found_what_you_typed_match = true;
       insertion_position = scored_results.begin();
     }
     SearchSuggestionParser::SuggestResult history_suggestion(
         trimmed_suggestion, AutocompleteMatchType::SEARCH_HISTORY,
         trimmed_suggestion, base::string16(), base::string16(),
-        base::string16(), base::string16(), std::string(), std::string(),
-        is_keyword, relevance, false, false, trimmed_input);
+        base::string16(), base::string16(), nullptr, std::string(),
+        std::string(), is_keyword, relevance, false, false, trimmed_input);
     // History results are synchronous; they are received on the last keystroke.
     history_suggestion.set_received_after_last_keystroke(false);
     scored_results.insert(insertion_position, history_suggestion);
   }
 
   // History returns results sorted for us.  However, we may have docked some
   // results' scores, so things are no longer in order.  While keeping the
   // what-you-typed match at the front (if it exists), do a stable sort to get
   // things back in order without otherwise disturbing results with equal
   // scores, then force the scores to be unique, so that the order in which
@@ skipping 351 matching lines @@
   for (MatchMap::const_iterator i(map.begin()); i != map.end(); ++i)
     matches.push_back(i->second);
   std::sort(matches.begin(), matches.end(), &AutocompleteMatch::MoreRelevant);
 
   // If there is a top scoring entry, find the corresponding answer.
   if (!matches.empty())
     return answers_cache_.GetTopAnswerEntry(matches[0].contents);
 
   return AnswersQueryData();
 }