[Omnibox] Don't show image on single line suggestions

This Cl resets the suggestion image so that the entity image is not seen
in a non-entity result.

Bug: 839578
Change-Id: I398aee581b559dd8a59ad2d55581f5d55cbbfea5
Reviewed-on: https://chromium-review.googlesource.com/1043101Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Dave Schuyler <dschuyler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556186}

chrome/browser/ui/views/omnibox/omnibox_match_cell_view.cc

@@ -161,9 +161,14 @@ void OmniboxMatchCellView::OnMatchUpdate(const AutocompleteMatch& match) {
        !match.image_url.empty());
   is_search_type_ = AutocompleteMatch::IsSearchType(match.type);
   if (is_old_style_answer_ || is_rich_suggestion_) {
+    // Multi-line layout doesn't use the separator.
     separator_view_->SetSize(gfx::Size());
+  } else {
+    // Single-line layout doesn't use the image.
+    image_view_->SetSize(gfx::Size());
   }
   if (is_rich_suggestion_) {
+    // All rich suggestions don't use the old (small) icon.
     icon_view_->SetSize(gfx::Size());
   }
 }