Remove histograms NewTabPage.IconsReal/IconsColor/IconsGray

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 4acc1c0d5c5fed99bf1db596d246579ac0be8581..a2139ae338be27f3c8bb7560d50dab5b7e5af811 100644
--- a/components/ntp_tiles/metrics.cc
+++ b/components/ntp_tiles/metrics.cc
@@ -82,8 +82,6 @@ void RecordPageImpression(const std::vector<TileImpression>& tiles,
                           rappor::RapporService* rappor_service) {
   UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.NumberOfTiles", tiles.size());
 
-  int counts_per_type[NUM_RECORDED_TILE_TYPES] = {0};
-  bool have_tile_types = false;
   for (int index = 0; index < static_cast<int>(tiles.size()); index++) {
     NTPTileSource source = tiles[index].source;
     MostVisitedTileType tile_type = tiles[index].type;
@@ -101,9 +99,6 @@ void RecordPageImpression(const std::vector<TileImpression>& tiles,
       continue;
     }
 
-    have_tile_types = true;
-    ++counts_per_type[tile_type];
-
     UMA_HISTOGRAM_ENUMERATION("NewTabPage.TileType", tile_type,
                               NUM_RECORDED_TILE_TYPES);
 
@@ -123,15 +118,6 @@ void RecordPageImpression(const std::vector<TileImpression>& tiles,
       LogHistogramEvent(icon_impression_histogram, index, kMaxNumTiles);
     }
   }
-
-  if (have_tile_types) {
-    UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.IconsReal",
-                                counts_per_type[ICON_REAL]);
-    UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.IconsColor",
-                                counts_per_type[ICON_COLOR]);
-    UMA_HISTOGRAM_SPARSE_SLOWLY("NewTabPage.IconsGray",
-                                counts_per_type[ICON_DEFAULT]);
-  }
 }
 
 void RecordTileClick(int index,