Add support for tagging layers.

webkit/compositor_bindings/web_layer_impl.cc

Index: webkit/compositor_bindings/web_layer_impl.cc
diff --git a/webkit/compositor_bindings/web_layer_impl.cc b/webkit/compositor_bindings/web_layer_impl.cc
index d73796ed3f21410a424ad589f523140624f80ec7..73d015c01a1398290d009130815daf9d6ae9184f 100644
--- a/webkit/compositor_bindings/web_layer_impl.cc
+++ b/webkit/compositor_bindings/web_layer_impl.cc
@@ -418,6 +418,26 @@ void WebLayerImpl::setScrollClient(WebLayerScrollClient* scrollClient)
     m_layer->setLayerScrollClient(scrollClient);
 }
 
+void WebLayerImpl::setTags(unsigned tags)
+{
+    m_layer->setTags(tags);
+}
+
+unsigned WebLayerImpl::getTags() const
+{
+    return m_layer->getTags();
+}
+
+void WebLayerImpl::addTag(WebLayer::Tag tag)
+{
+    m_layer->addTag(static_cast<cc::Layer::Tag>(tag));
+}
+
+bool WebLayerImpl::getTag(WebLayer::Tag tag) const
+{
+    return m_layer->getTag(static_cast<cc::Layer::Tag>(tag));
+}
+
 Layer* WebLayerImpl::layer() const
 {
     return m_layer.get();