Fixing crash in PictureLayerImpl::MarkVisibleResourcesAsRequired when low-res tiles are disabled

cc/test/fake_picture_layer_impl.cc

Index: cc/test/fake_picture_layer_impl.cc
diff --git a/cc/test/fake_picture_layer_impl.cc b/cc/test/fake_picture_layer_impl.cc
index 88dde4dbdc638e4b838773c4567e5eef0cbd90a8..3f5b82a7bc2929bf0495764ec9ae7034a8d8863d 100644
--- a/cc/test/fake_picture_layer_impl.cc
+++ b/cc/test/fake_picture_layer_impl.cc
@@ -136,11 +136,14 @@ void FakePictureLayerImpl::CreateDefaultTilingsAndTiles() {
   layer_tree_impl()->UpdateDrawProperties();
 
   if (CanHaveTilings()) {
-    DCHECK_EQ(tilings()->num_tilings(), 2u);
+    DCHECK_EQ(tilings()->num_tilings(),
+              layer_tree_impl()->settings().create_low_res_tiling ? 2u : 1u);
     DCHECK_EQ(tilings()->tiling_at(0)->resolution(), HIGH_RESOLUTION);
-    DCHECK_EQ(tilings()->tiling_at(1)->resolution(), LOW_RESOLUTION);
     HighResTiling()->CreateAllTilesForTesting();
-    LowResTiling()->CreateAllTilesForTesting();
+    if (layer_tree_impl()->settings().create_low_res_tiling) {
+      DCHECK_EQ(tilings()->tiling_at(1)->resolution(), LOW_RESOLUTION);
+      LowResTiling()->CreateAllTilesForTesting();
+    }
   } else {
     DCHECK_EQ(tilings()->num_tilings(), 0u);
   }