Speculative fix for Null-dereference crash

Bug: 936504
Change-Id: I98436eb82c64fe5b3b6ba1a9d39176317883026a
Reviewed-on: https://chromium-review.googlesource.com/c/1496239
Commit-Queue: Kevin Strohbehn <ginko@google.com>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: Kevin Strohbehn <ginko@google.com>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636623}

ash/app_list/views/search_result_page_view.cc

@@ -204,6 +204,10 @@ void SearchResultPageView::AddSearchResultContainerView(
 }
 
 bool SearchResultPageView::IsFirstResultTile() const {
+  // In the event that the result does not exist, it is not a tile.
+  if (!first_result_view_ || !first_result_view_->result())
+    return false;
+
   // |kRecommendation| result type refers to tiles in Zero State.
   return first_result_view_->result()->display_type() ==
              ash::SearchResultDisplayType::kTile ||