Factor parsing "ln=" to SuggestionAnswer

components/omnibox/browser/suggestion_answer.h

Index: components/omnibox/browser/suggestion_answer.h
diff --git a/components/omnibox/browser/suggestion_answer.h b/components/omnibox/browser/suggestion_answer.h
index 8b9c04284b7153a6cbe8862855a92992444dd3a9..e59ad7f60d80cbaba01bb38319a3640e0b2cd0bd 100644
--- a/components/omnibox/browser/suggestion_answer.h
+++ b/components/omnibox/browser/suggestion_answer.h
@@ -105,6 +105,7 @@ class SuggestionAnswer {
                                ImageLine* image_line);
 
     const TextFields& text_fields() const { return text_fields_; }
+    int num_text_lines() const { return num_text_lines_; }
     const TextField* additional_text() const { return additional_text_.get(); }
     const TextField* status_text() const { return status_text_.get(); }
     const GURL& image_url() const { return image_url_; }
@@ -120,6 +121,7 @@ class SuggestionAnswer {
     ImageLine& operator=(const ImageLine&);
 
     TextFields text_fields_;
+    int num_text_lines_;
     std::unique_ptr<TextField> additional_text_;
     std::unique_ptr<TextField> status_text_;
     GURL image_url_;
@@ -128,7 +130,7 @@ class SuggestionAnswer {
   };
 
   SuggestionAnswer();
-  SuggestionAnswer(const SuggestionAnswer& answer);
+  SuggestionAnswer(const SuggestionAnswer& answer) = default;
   ~SuggestionAnswer();
 
   // Parses |answer_json| and returns a SuggestionAnswer containing the