Store non-fast scrollable regions on ScrollNode

cc/trees/layer_tree_host_common_unittest.cc

Index: cc/trees/layer_tree_host_common_unittest.cc
diff --git a/cc/trees/layer_tree_host_common_unittest.cc b/cc/trees/layer_tree_host_common_unittest.cc
index 31f5343c3f913aa43a32c3e361e73d5855868294..45782b01bf6d9403e695142a57a70c7010b534cf 100644
--- a/cc/trees/layer_tree_host_common_unittest.cc
+++ b/cc/trees/layer_tree_host_common_unittest.cc
@@ -10674,7 +10674,7 @@ TEST_F(LayerTreeHostCommonTest, ScrollTreeBuilderTest) {
   property_tree_root->scrollable = false;
   property_tree_root->main_thread_scrolling_reasons =
       MainThreadScrollingReason::kNotScrollingOnMain;
-  property_tree_root->contains_non_fast_scrollable_region = false;
+  property_tree_root->non_fast_scrollable_region = Region();
   property_tree_root->transform_id = kRootPropertyTreeNodeId;
 
   // The node owned by root1
@@ -10740,7 +10740,7 @@ TEST_F(LayerTreeHostCommonTest, ScrollTreeBuilderTest) {
   ScrollNode scroll_parent5;
   scroll_parent5.id = 8;
   scroll_parent5.owning_layer_id = parent5->id();
-  scroll_parent5.contains_non_fast_scrollable_region = true;
+  scroll_parent5.non_fast_scrollable_region = gfx::Rect(0, 0, 50, 50);
   scroll_parent5.bounds = gfx::Size(10, 10);
   scroll_parent5.should_flatten = true;
   scroll_parent5.user_scrollable_horizontal = true;