Remove provider index from Android NewTabPage histograms

chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedItem.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedItem.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedItem.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedItem.java
index 1eaecdbd1d95fa949803987388d8fd82a0919e3b..0207bc294cbd2ccbaa6efc51404526f31fb18a27 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedItem.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedItem.java
@@ -54,7 +54,6 @@ public class MostVisitedItem implements OnCreateContextMenuListener,
     private int mIndex;
     private int mTileType;
     private int mSource;
-    private int mProviderIndex;
     private View mView;
 
     /**
@@ -69,12 +68,9 @@ public class MostVisitedItem implements OnCreateContextMenuListener,
      * @param offlineAvailable Whether there is an offline copy of the URL available.
      * @param index The index of this item in the list of most visited items.
      * @param source The {@link MostVisitedSource} that generated this item.
-     * @param providerIndex If this item comes from {@code MostVisitedSource.SUGGESTIONS_SERVICE},
-     *     this is the index of the source of the suggestion.
      */
     public MostVisitedItem(MostVisitedItemManager manager, String title, String url,
-            String whitelistIconPath, boolean offlineAvailable, int index, int source,
-            int providerIndex) {
+            String whitelistIconPath, boolean offlineAvailable, int index, int source) {
         mManager = manager;
         mTitle = title;
         mUrl = url;
@@ -83,7 +79,6 @@ public class MostVisitedItem implements OnCreateContextMenuListener,
         mIndex = index;
         mTileType = MostVisitedTileType.NONE;
         mSource = source;
-        mProviderIndex = index;
     }
 
     /**
@@ -170,13 +165,6 @@ public class MostVisitedItem implements OnCreateContextMenuListener,
         return mSource;
     }
 
-    /**
-     * @return The provider index of this item.  Used for metrics tracking.
-     */
-    public int getProviderIndex() {
-        return mProviderIndex;
-    }
-
     @Override
     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
         mManager.onCreateContextMenu(menu, this);