ntp_tiles: Cleanup enum names

chrome/common/instant.mojom

Index: chrome/common/instant.mojom
diff --git a/chrome/common/instant.mojom b/chrome/common/instant.mojom
index 287c846952e17417423ecd3180087c87aa7e8e23..581a8b5cc97e4f02cbf0a8d24ab5c7bbcc1d7c28 100644
--- a/chrome/common/instant.mojom
+++ b/chrome/common/instant.mojom
@@ -15,7 +15,7 @@ enum NTPLoggingEventType;
 enum OmniboxFocusState;
 
 [Native]
-enum NTPTileSource;
+enum TileSource;
 
 // Interface used to connect to the embedded search interface. This is a
 // separate interface such that a reverse connection (|client| below) can be
@@ -57,12 +57,12 @@ interface Instant {
   // Logs an impression on one of the Most Visited tile on the InstantExtended
   // New Tab Page.
   LogMostVisitedImpression(int32 page_seq_no, int32 position,
-                           NTPTileSource tile_source);
+                           TileSource tile_source);
 
   // Logs a navigation on one of the Most Visited tile on the InstantExtended
   // New Tab Page.
   LogMostVisitedNavigation(int32 page_seq_no, int32 position,
-                           NTPTileSource tile_source);
+                           TileSource tile_source);
 
   // Tells InstantExtended to paste text into the omnibox.  If text is empty,
   // the clipboard contents will be pasted. This causes the omnibox dropdown to