Fix int cast in data saver remaining sites data usage

Bug: 818520
Change-Id: Id9a9c289a29ab9b1ccef5eff4f0019bb47363866
Reviewed-on: https://chromium-review.googlesource.com/969452Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: rajendrant <rajendrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544154}

chrome/android/java/src/org/chromium/chrome/browser/preferences/datareduction/DataReductionSiteBreakdownView.java

@@ -232,10 +232,8 @@ public class DataReductionSiteBreakdownView extends LinearLayout {
                 mTableLayout.addView(row, i + 1);
             } else {
                 numRemainingSites++;
-                everythingElseDataUsage =
-                        (int) (everythingElseDataUsage + mDataUseItems.get(i).getDataUsed());
-                everythingElseDataSavings =
-                        (int) (everythingElseDataSavings + mDataUseItems.get(i).getDataSaved());
+                everythingElseDataUsage += mDataUseItems.get(i).getDataUsed();
+                everythingElseDataSavings += mDataUseItems.get(i).getDataSaved();
             }
         }