Add SuperPropertyGet.

pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart

Index: pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
diff --git a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
index 7ee6e778ba93b21f51d842ca73a40b475a7dfc6a..361b929b151db6b43511aa887172df18b05a8436 100644
--- a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
+++ b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
@@ -202,8 +202,12 @@ class KernelAstAdapter implements KernelElementAdapter {
   }
 
   Selector getSelector(ir.Expression node) {
-    if (node is ir.PropertyGet) return getGetterSelector(node);
-    if (node is ir.PropertySet) return getSetterSelector(node);
+    if (node is ir.PropertyGet || node is ir.SuperPropertyGet) {
+      return getGetterSelector(node);
+    }
+    if (node is ir.PropertySet || node is ir.SuperPropertySet) {
+      return getSetterSelector(node);
+    }
     if (node is ir.InvocationExpression) return getInvocationSelector(node);
     _compiler.reporter.internalError(getNode(node),
         "Can only get the selector for a property get or an invocation.");
@@ -227,14 +231,18 @@ class KernelAstAdapter implements KernelElementAdapter {
     return new Selector(kind, name, callStructure);
   }
 
-  Selector getGetterSelector(ir.PropertyGet getter) {
+  Selector getGetterSelector(ir.Expression getter) {
+    // Getter is a PropertyGet or SuperPropertyGet.
+    // TODO(efortuna): Common interface?

[Emily Fortuna, 2017/01/31 00:17:16]

these are clearly screaming out for a common interface.... :-/

     ir.Name irName = getter.name;
     Name name = new Name(
         irName.name, irName.isPrivate ? getElement(irName.library) : null);
     return new Selector.getter(name);
   }
 
-  Selector getSetterSelector(ir.PropertySet setter) {
+  Selector getSetterSelector(ir.Expression setter) {
+    // Getter is a PropertySet or SuperPropertySet.
+    // TODO(efortuna): Common interface?
     ir.Name irName = setter.name;
     Name name = new Name(
         irName.name, irName.isPrivate ? getElement(irName.library) : null);