compositor-worker: plumb element id and mutable properties

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 bde0bdf1925251f036aeeaffef70051c76fdd42e..cdf316036654040f0ef1228f7e002ece0b6885e5 100644
--- a/cc/blink/web_layer_impl.cc
+++ b/cc/blink/web_layer_impl.cc
@@ -13,6 +13,7 @@
 #include "base/threading/thread_checker.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "cc/animation/animation.h"
+#include "cc/animation/mutable_properties.h"
 #include "cc/base/region.h"
 #include "cc/base/switches.h"
 #include "cc/blink/web_animation_impl.h"
@@ -23,6 +24,7 @@
 #include "cc/layers/layer_position_constraint.h"
 #include "cc/layers/layer_settings.h"
 #include "cc/trees/layer_tree_host.h"
+#include "third_party/WebKit/public/platform/WebCompositorMutableProperties.h"
 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
 #include "third_party/WebKit/public/platform/WebFloatRect.h"
 #include "third_party/WebKit/public/platform/WebLayerPositionConstraint.h"
@@ -494,6 +496,51 @@ const cc::Layer* WebLayerImpl::ccLayer() const {
   return layer_.get();
 }
 
+void WebLayerImpl::setElementId(uint64_t id) {
+  layer_->SetElementId(id);
+}
+
+uint64_t WebLayerImpl::elementId() const {
+  return layer_->element_id();
+}
+
+static_assert(
+    static_cast<cc::MutableProperty>(blink::WebCompositorMutablePropertyNone) ==
+        cc::kMutablePropertyNone,
+    "MutableProperty and WebCompositorMutableProperty enums must match");
+
+static_assert(
+    static_cast<cc::MutableProperty>(
+        blink::WebCompositorMutablePropertyOpacity) ==
+        cc::kMutablePropertyOpacity,
+    "MutableProperty and WebCompositorMutableProperty enums must match");
+
+static_assert(
+    static_cast<cc::MutableProperty>(
+        blink::WebCompositorMutablePropertyScrollLeft) ==
+        cc::kMutablePropertyScrollLeft,
+    "MutableProperty and WebCompositorMutableProperty enums must match");
+
+static_assert(
+    static_cast<cc::MutableProperty>(
+        blink::WebCompositorMutablePropertyScrollTop) ==
+        cc::kMutablePropertyScrollTop,
+    "MutableProperty and WebCompositorMutableProperty enums must match");
+
+static_assert(
+    static_cast<cc::MutableProperty>(
+        blink::WebCompositorMutablePropertyTransform) ==
+        cc::kMutablePropertyTransform,
+    "MutableProperty and WebCompositorMutableProperty enums must match");
+
+void WebLayerImpl::setCompositorMutableProperties(uint32_t properties) {
+  layer_->SetMutableProperties(properties);
+}
+
+uint32_t WebLayerImpl::compositorMutableProperties() const {
+  return layer_->mutable_properties();
+}
+
 void WebLayerImpl::setScrollParent(blink::WebLayer* parent) {
   cc::Layer* scroll_parent = nullptr;
   if (parent)