dart2js cps: Introduce GetStatic/SetStatic.

pkg/compiler/lib/src/dart_backend/backend_ast_emitter.dart

Index: pkg/compiler/lib/src/dart_backend/backend_ast_emitter.dart
diff --git a/pkg/compiler/lib/src/dart_backend/backend_ast_emitter.dart b/pkg/compiler/lib/src/dart_backend/backend_ast_emitter.dart
index bd225684c764092b873c777d457d35beeacd0818..217a5fb1ce5bfdb4d9bdde1a9eae5146f99edb32 100644
--- a/pkg/compiler/lib/src/dart_backend/backend_ast_emitter.dart
+++ b/pkg/compiler/lib/src/dart_backend/backend_ast_emitter.dart
@@ -969,6 +969,21 @@ class ASTEmitter
   }
 
   @override
+  Expression visitGetStatic(tree.GetStatic node,
+                            BuilderContext<Statement> context) {
+    return new Identifier(node.element.name)..element = node.element;

[karlklose, 2015/05/11 13:10:46]

Not (only) your code: Could we add an optional argument to the constructor
instead of this pattern? Is the element ever changed?

[asgerf, 2015/05/11 13:16:57]

This file and the backend AST will be deleted soon anyway.

Originally, the element was supposed to go away when we could replace the old
dart2dart backend. That's why it was tacked on like that.

+  }
+
+  @override
+  Expression visitSetStatic(tree.SetStatic node,
+                            BuilderContext<Statement> context) {
+    Expression target =
+        new Identifier(node.element.name)..element = node.element;
+    Expression value = visitExpression(node.value, context);
+    return makeAssignment(target, value);
+  }
+
+  @override
   Expression visitTypeExpression(tree.TypeExpression node, arg) {
     throw '$node not supported by dart backend';
   }