Add a class to parse answer json.

components/omnibox/autocomplete_match.cc

Index: components/omnibox/autocomplete_match.cc
diff --git a/components/omnibox/autocomplete_match.cc b/components/omnibox/autocomplete_match.cc
index 558ed93c417838a47d571751bb9febce2e7b83d4..efe770e61e932f428515539f673a9737376f9c98 100644
--- a/components/omnibox/autocomplete_match.cc
+++ b/components/omnibox/autocomplete_match.cc
@@ -12,6 +12,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "components/omnibox/autocomplete_provider.h"
+#include "components/omnibox/suggestion_answer.h"
 #include "components/search_engines/template_url.h"
 #include "components/search_engines/template_url_service.h"
 #include "grit/components_scaled_resources.h"
@@ -79,6 +80,7 @@ AutocompleteMatch::AutocompleteMatch(const AutocompleteMatch& match)
       description_class(match.description_class),
       answer_contents(match.answer_contents),
       answer_type(match.answer_type),
+      answer(SuggestionAnswer::copy(match.answer.get())),

[groby-ooo-7-16, 2014/10/30 20:28:29]

match.answer should suffice - here and elsewhere.

[Justin Donnelly, 2014/10/30 21:38:03]

It doesn't seem to (I tried and I don't see what in scoped_ptr.h would support
that).  Let me know if I'm missing something.

[Peter Kasting, 2014/10/30 22:09:37]

Yeah, it wouldn't unless you made copy() take a const scoped_ptr& instead of a
raw pointer.  I thought about suggesting that change, but I wasn't sure whether
it would have been a win overall, and it seems a little iffy in principle (the
function doesn't care whether the source data is in a scoped_ptr, so why should
its API force the issue?).

[groby-ooo-7-16, 2014/10/30 22:13:58]

Sorry - was thinking of scoped_nsobject

       transition(match.transition),
       is_history_what_you_typed_match(match.is_history_what_you_typed_match),
       type(match.type),
@@ -116,6 +118,7 @@ AutocompleteMatch& AutocompleteMatch::operator=(
   description_class = match.description_class;
   answer_contents = match.answer_contents;
   answer_type = match.answer_type;
+  answer = SuggestionAnswer::copy(match.answer.get());
   transition = match.transition;
   is_history_what_you_typed_match = match.is_history_what_you_typed_match;
   type = match.type;