Remove provider index from Android NewTabPage histograms

chrome/browser/android/ntp/most_visited_sites_bridge.cc

Index: chrome/browser/android/ntp/most_visited_sites_bridge.cc
diff --git a/chrome/browser/android/ntp/most_visited_sites_bridge.cc b/chrome/browser/android/ntp/most_visited_sites_bridge.cc
index 92e83a83873f98177170e27389b10b137b879255..6272acfe2502daf26c0ad416156cd210a94216bc 100644
--- a/chrome/browser/android/ntp/most_visited_sites_bridge.cc
+++ b/chrome/browser/android/ntp/most_visited_sites_bridge.cc
@@ -120,26 +120,22 @@ void MostVisitedSitesBridge::JavaObserver::OnMostVisitedURLsAvailable(
   std::vector<std::string> urls;
   std::vector<std::string> whitelist_icon_paths;
   std::vector<int> sources;
-  std::vector<int> provider_indexes;
 
   titles.reserve(suggestions.size());
   urls.reserve(suggestions.size());
   whitelist_icon_paths.reserve(suggestions.size());
   sources.reserve(suggestions.size());
-  provider_indexes.reserve(suggestions.size());
   for (const auto& suggestion : suggestions) {
     titles.emplace_back(suggestion.title);
     urls.emplace_back(suggestion.url.spec());
     whitelist_icon_paths.emplace_back(suggestion.whitelist_icon_path.value());
     sources.emplace_back(suggestion.source);
-    provider_indexes.emplace_back(suggestion.provider_index);
   }
   Java_MostVisitedURLsObserver_onMostVisitedURLsAvailable(
       env, observer_.obj(), ToJavaArrayOfStrings(env, titles).obj(),
       ToJavaArrayOfStrings(env, urls).obj(),
       ToJavaArrayOfStrings(env, whitelist_icon_paths).obj(),
-      ToJavaIntArray(env, sources).obj(),
-      ToJavaIntArray(env, provider_indexes).obj());
+      ToJavaIntArray(env, sources).obj());
 }
 
 void MostVisitedSitesBridge::JavaObserver::OnPopularURLsAvailable(
@@ -204,18 +200,14 @@ void MostVisitedSitesBridge::RecordTileTypeMetrics(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jintArray>& jtile_types,
-    const JavaParamRef<jintArray>& jsources,
-    const JavaParamRef<jintArray>& jprovider_indices) {
+    const JavaParamRef<jintArray>& jsources) {
   std::vector<int> tile_types;
   std::vector<int> sources;
-  std::vector<int> provider_indices;
 
   base::android::JavaIntArrayToIntVector(env, jtile_types, &tile_types);
   base::android::JavaIntArrayToIntVector(env, jsources, &sources);
-  base::android::JavaIntArrayToIntVector(env, jprovider_indices,
-                                         &provider_indices);
 
-  most_visited_.RecordTileTypeMetrics(tile_types, sources, provider_indices);
+  most_visited_.RecordTileTypeMetrics(tile_types, sources);
 }
 
 void MostVisitedSitesBridge::RecordOpenedMostVisitedItem(