Fix classes that have too many virtuals for inline constructors.

cc/trees/property_tree.cc

Index: cc/trees/property_tree.cc
diff --git a/cc/trees/property_tree.cc b/cc/trees/property_tree.cc
index a6b72e6b102d57050c07b1f924de6d00faef8310..449637145106b39c7e49e59e6b6180b9dbcb6c34 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -1039,6 +1039,8 @@ void TransformTree::UpdateNodeAndAncestorsHaveIntegerTranslations(
         parent_node->data.node_and_ancestors_have_only_integer_translation;
 }
 
+ClipTree::ClipTree() = default;
+
 void ClipTree::SetViewportClip(gfx::RectF viewport_rect) {
   if (size() < 2)
     return;
@@ -1073,6 +1075,8 @@ void ClipTree::FromProtobuf(const proto::PropertyTree& proto) {
   PropertyTree::FromProtobuf(proto);
 }
 
+EffectTree::EffectTree() = default;
+
 bool EffectTree::operator==(const EffectTree& other) const {
   return PropertyTree::operator==(other);
 }