NewTabPage: Remove impression/click ping plumbing for local NTP

components/suggestions/proto/suggestions.proto

Index: components/suggestions/proto/suggestions.proto
diff --git a/components/suggestions/proto/suggestions.proto b/components/suggestions/proto/suggestions.proto
index 12621e4b7eb7f6ba883a2421ed29a316395db4e2..27f5d141c33145bbaf1c9e3310555a7a1f97c8c6 100644
--- a/components/suggestions/proto/suggestions.proto
+++ b/components/suggestions/proto/suggestions.proto
@@ -52,10 +52,6 @@ message ChromeSuggestion {
 
   // The timestamp (usec) at which this suggestion ceases to be valid.
   optional int64 expiry_ts = 7;
-
-  // URL that should be pinged back when the suggestion is shown/clicked.
-  optional string impression_url = 13;
-  optional string click_url = 14;

[mastiz, 2016/11/28 13:46:22]

Can you please either:
a) Mark field tags 13 and 14 as reserved.
b) Add a comment higher up saying: "Next ID: 15".

[Marc Treib, 2016/11/28 13:56:47]

There already is a comment above ("Next tag: 15")

 }
 
 // A list of URLs that should be filtered from the SuggestionsProfile.