Clear bottom sheet when renderer crashes

Bug: 840523
Change-Id: I4676c3ee4f5b812173193b45a02a88291afac8ab
Reviewed-on: https://chromium-review.googlesource.com/1048403Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557269}

chrome/android/java/src/org/chromium/chrome/browser/widget/bottomsheet/BottomSheetController.java

@@ -108,6 +108,12 @@ public class BottomSheetController implements ApplicationStatus.ActivityStateLis
                 if (tab != tabModelSelector.getCurrentTab()) return;
                 clearRequestsAndHide();
             }
+
+            @Override
+            public void onCrash(Tab tab, boolean sadTabShown) {
+                if (tab != tabModelSelector.getCurrentTab()) return;
+                clearRequestsAndHide();
+            }
         };
 
         final TabModelObserver tabSelectionObserver = new EmptyTabModelObserver() {