[NTP] Fix article suggestion clicks contributing to Most Visited tiles

ui/base/page_transition_types.h

Index: ui/base/page_transition_types.h
diff --git a/ui/base/page_transition_types.h b/ui/base/page_transition_types.h
index eafea5237651e9513b2677804968c8d265a18a66..76e70d86feddf9dbcf00d9741dc9ed0a1ae607db 100644
--- a/ui/base/page_transition_types.h
+++ b/ui/base/page_transition_types.h
@@ -109,6 +109,9 @@ enum PageTransition {
   // Any of the core values above can be augmented by one or more qualifiers.
   // These qualifiers further define the transition.
 
+  // The visited URL won't contribute to Most Visited tiles in the NTP.
+  PAGE_TRANSITION_IGNORE_FOR_NTP_TILES = 0x00400000,
+
   // A managed user attempted to visit a URL but was blocked.
   PAGE_TRANSITION_BLOCKED = 0x00800000,