ntp_tiles: Cleanup enum names

components/ntp_tiles/metrics.cc

Index: components/ntp_tiles/metrics.cc
diff --git a/components/ntp_tiles/metrics.cc b/components/ntp_tiles/metrics.cc
index a2139ae338be27f3c8bb7560d50dab5b7e5af811..b1121c738c70639c7335e21bc8f64b9c72a79777 100644
--- a/components/ntp_tiles/metrics.cc
+++ b/components/ntp_tiles/metrics.cc
@@ -59,7 +59,7 @@ std::string GetSourceHistogramName(NTPTileSource source) {
   return std::string();
 }
 
-const char* GetIconTypeSuffix(MostVisitedTileType type) {
+const char* GetIconTypeSuffix(NTPTileType type) {
   switch (type) {
     case ICON_COLOR:
       return kIconTypeSuffixColor;
@@ -84,7 +84,7 @@ void RecordPageImpression(const std::vector<TileImpression>& tiles,
 
   for (int index = 0; index < static_cast<int>(tiles.size()); index++) {
     NTPTileSource source = tiles[index].source;
-    MostVisitedTileType tile_type = tiles[index].type;
+    NTPTileType tile_type = tiles[index].type;
     const GURL& url = tiles[index].url;
 
     UMA_HISTOGRAM_ENUMERATION("NewTabPage.SuggestionsImpression", index,
@@ -120,9 +120,7 @@ void RecordPageImpression(const std::vector<TileImpression>& tiles,
   }
 }
 
-void RecordTileClick(int index,
-                     NTPTileSource source,
-                     MostVisitedTileType tile_type) {
+void RecordTileClick(int index, NTPTileSource source, NTPTileType tile_type) {
   UMA_HISTOGRAM_ENUMERATION("NewTabPage.MostVisited", index, kMaxNumTiles);
 
   std::string histogram = base::StringPrintf(