Add initial CC support for scroll-blocks-on

cc/blink/web_layer_impl.cc

Index: cc/blink/web_layer_impl.cc
diff --git a/cc/blink/web_layer_impl.cc b/cc/blink/web_layer_impl.cc
index 6ce8ac5cbcdcc16424a6b5a1591f859744a5d56a..b54d6258e0d80d19dcd2c48fc9ab7137b0968571 100644
--- a/cc/blink/web_layer_impl.cc
+++ b/cc/blink/web_layer_impl.cc
@@ -383,6 +383,30 @@ WebVector<WebRect> WebLayerImpl::touchEventHandlerRegion() const {
   return result;
 }
 
+COMPILE_ASSERT(static_cast<ScrollBlocksOn>(blink::WebScrollBlocksOnNone) ==
+                   ScrollBlocksOnNone,
+               ScrollBlocksOn_enum_mismatch);
+COMPILE_ASSERT(
+    static_cast<ScrollBlocksOn>(blink::WebScrollBlocksOnStartTouch) ==
+        ScrollBlocksOnStartTouch,
+    ScrollBlocksOn_enum_mismatch);
+COMPILE_ASSERT(
+    static_cast<ScrollBlocksOn>(blink::WebScrollBlocksOnWheelEvent) ==
+        ScrollBlocksOnWheelEvent,
+    ScrollBlocksOn_enum_mismatch);
+COMPILE_ASSERT(
+    static_cast<ScrollBlocksOn>(blink::WebScrollBlocksOnScrollEvent) ==
+        ScrollBlocksOnScrollEvent,
+    ScrollBlocksOn_enum_mismatch);
+
+void WebLayerImpl::setScrollBlocksOn(blink::WebScrollBlocksOn blocks) {
+  layer_->SetScrollBlocksOn(static_cast<ScrollBlocksOn>(blocks));
+}
+
+blink::WebScrollBlocksOn WebLayerImpl::scrollBlocksOn() const {
+  return static_cast<blink::WebScrollBlocksOn>(layer_->scroll_blocks_on());
+}
+
 void WebLayerImpl::setIsContainerForFixedPositionLayers(bool enable) {
   layer_->SetIsContainerForFixedPositionLayers(enable);
 }