Implement CSS: scroll-boundary-behavior

cc/layers/layer.h

Index: cc/layers/layer.h
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index c88721b0fa6e1e82ad3728900e1d3f93b7cc566b..d07a517175cc6284637343f34624fd6547b90f40 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -22,6 +22,7 @@
 #include "cc/benchmarks/micro_benchmark.h"
 #include "cc/cc_export.h"
 #include "cc/input/input_handler.h"
+#include "cc/input/scroll_boundary_behavior.h"
 #include "cc/layers/layer_collections.h"
 #include "cc/layers/layer_position_constraint.h"
 #include "cc/paint/paint_record.h"
@@ -114,6 +115,11 @@ class CC_EXPORT Layer : public base::RefCounted<Layer> {
   void SetBounds(const gfx::Size& bounds);
   gfx::Size bounds() const { return inputs_.bounds; }
 
+  void SetScrollBoundaryBehavior(ScrollBoundaryBehavior behavior);

[bokan, 2017/05/19 19:35:57]

pass by const-ref

[sunyunjia, 2017/05/25 20:07:10]

Done.

+  ScrollBoundaryBehavior scroll_boundary_behavior() const {
+    return inputs_.scroll_boundary_behavior;
+  }
+
   void SetMasksToBounds(bool masks_to_bounds);
   bool masks_to_bounds() const { return inputs_.masks_to_bounds; }
 
@@ -593,6 +599,8 @@ class CC_EXPORT Layer : public base::RefCounted<Layer> {
     LayerClient* client;
     base::Callback<void(const gfx::ScrollOffset&)> did_scroll_callback;
     std::vector<std::unique_ptr<CopyOutputRequest>> copy_requests;
+
+    ScrollBoundaryBehavior scroll_boundary_behavior;
   };
 
   Layer* parent_;