Allow fetching personalized snippets from ChromeReader.

components/ntp_snippets/ntp_snippet.h

Index: components/ntp_snippets/ntp_snippet.h
diff --git a/components/ntp_snippets/ntp_snippet.h b/components/ntp_snippets/ntp_snippet.h
index 688098417031b001a998594a0b29b9fa780c18ee..f92d440713403b95d28f9eb28df5471514acf813 100644
--- a/components/ntp_snippets/ntp_snippet.h
+++ b/components/ntp_snippets/ntp_snippet.h
@@ -82,6 +82,9 @@ class NTPSnippet {
   const GURL& amp_url() const { return amp_url_; }
   void set_amp_url(const GURL& amp_url) { amp_url_ = amp_url; }
 
+  float score() const { return score_; }
+  void set_score(float score) { score_ = score; }
+
   // Public for testing.
   static base::Time TimeFromJsonString(const std::string& timestamp_str);
   static std::string TimeToJsonString(const base::Time& time);
@@ -96,6 +99,7 @@ class NTPSnippet {
   base::Time publish_date_;
   base::Time expiry_date_;
   GURL amp_url_;
+  float score_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippet);
 };