Download Home : Filter out the transient downloads

Transient downloads shouldn't show up on download home and hence should
be filtered out.

Bug: 908670
Change-Id: Ic7ff12a36a7c46a6d7f7e63fe0faede8173488e1
Reviewed-on: https://chromium-review.googlesource.com/c/1351717Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611037}

chrome/android/java/src/org/chromium/chrome/browser/download/home/filter/InvalidStateOfflineItemFilter.java

@@ -20,7 +20,7 @@ public class InvalidStateOfflineItemFilter extends OfflineItemFilter {
     // OfflineItemFilter implementation.
     @Override
     protected boolean isFilteredOut(OfflineItem item) {
-        if (item.externallyRemoved) return true;
+        if (item.externallyRemoved || item.isTransient) return true;
 
         switch (item.state) {
             case OfflineItemState.CANCELLED: