cc : Snap texture layers to pixel boundary

cc/proto/property_tree.proto

Index: cc/proto/property_tree.proto
diff --git a/cc/proto/property_tree.proto b/cc/proto/property_tree.proto
index ea5c44feb997d65988237f33266b7acff2194813..fa310436da1b5a6c8d89625fdbb6cdbb32b6d163 100644
--- a/cc/proto/property_tree.proto
+++ b/cc/proto/property_tree.proto
@@ -22,7 +22,7 @@ package cc.proto;
 // cc/trees/property_tree.h
 
 // Proto for struct TransformNodeData.
-// NEXT ID: 43
+// NEXT ID: 44
 message TranformNodeData {
   optional Transform pre_local = 1;
   optional Transform local = 2;
@@ -42,6 +42,7 @@ message TranformNodeData {
   optional bool node_and_ancestors_are_flat = 20;
   optional bool node_and_ancestors_have_only_integer_translation = 21;
   optional bool scrolls = 22;
+  optional bool should_be_snapped = 43;
   optional bool needs_surface_contents_scale = 23;
   optional bool affected_by_inner_viewport_bounds_delta_x = 24;
   optional bool affected_by_inner_viewport_bounds_delta_y = 25;
@@ -53,7 +54,7 @@ message TranformNodeData {
 
   optional Vector2dF surface_contents_scale = 34;
   optional ScrollOffset scroll_offset = 35;
-  optional Vector2dF scroll_snap = 36;
+  optional Vector2dF snap_amount = 36;
   optional Vector2dF source_offset = 37;
   optional Vector2dF source_to_parent = 38;
   optional int64 sorting_context_id = 39;