Download Home : Hide chips when only one file type

Bug: 889357
Change-Id: Idda6b6556f06b6ce1e6e638adb4495036b11d6cb
Reviewed-on: https://chromium-review.googlesource.com/1252982Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595277}

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

@@ -126,8 +126,8 @@ public class FilterChipsProvider implements ChipsProvider, OfflineItemFilterObse
             if (chip.enabled) visibleChips.add(chip);
         }
 
-        // Remove the none chip if no other chip is visible.
-        if (visibleChips.size() == 1) {
+        // If there is only one chip type or only NONE chips, remove the entire row of chips.
+        if (visibleChips.size() <= 2) {
             assert visibleChips.get(0).id == FilterType.NONE;
             visibleChips.clear();
         }