dart2dart: Method and constructor calls in new backend.

sdk/lib/_internal/compiler/implementation/dart_backend/tree_tracer.dart

Index: sdk/lib/_internal/compiler/implementation/dart_backend/tree_tracer.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dart_backend/tree_tracer.dart b/sdk/lib/_internal/compiler/implementation/dart_backend/tree_tracer.dart
index a9b35c0d30c5a3c2d0ed2397d0c04204dc1c9d5f..4c5f25c5f6c0fd6840c906f105f3b56542fdb360 100644
--- a/sdk/lib/_internal/compiler/implementation/dart_backend/tree_tracer.dart
+++ b/sdk/lib/_internal/compiler/implementation/dart_backend/tree_tracer.dart
@@ -43,6 +43,8 @@ class BlockCollector extends Visitor {
 
   visitVariable(Variable node) {}
   visitInvokeStatic(InvokeStatic node) {}
+  visitInvokeMethod(InvokeMethod node) {}
+  visitInvokeConstructor(InvokeConstructor node) {}
   visitConstant(Constant node) {}
 
   visitLabeledStatement(LabeledStatement node) {
@@ -161,6 +163,14 @@ class TreeTracer extends TracerUtil with Visitor {
     String rhs = expr(node.definition);
     printStatement(name, "let $name = $rhs");
   }
+  
+  visitInvokeMethod(InvokeMethod node) {
+    printStatement(null, expr(node));
+  }
+  
+  visitInvokeConstructor(InvokeConstructor node) {
+    printStatement(null, expr(node));
+  }
 
   visitReturn(Return node) {
     printStatement(null, "return ${expr(node.value)}");
@@ -200,6 +210,24 @@ class SubexpressionVisitor extends Visitor<String, String> {
     String args = node.arguments.map((e) => e.accept(this)).join(', ');
     return "$head($args)";
   }
+  
+  String visitInvokeMethod(InvokeMethod node) {
+    String receiver = node.receiver.accept(this);
+    String name = node.selector.name;
+    String args = node.arguments.map((e) => e.accept(this)).join(', ');
+    return "$receiver.$name($args)";
+  }
+  
+  String visitInvokeConstructor(InvokeConstructor node) {
+    String callName;
+    if (node.target.name.isEmpty) {
+      callName = '${node.type}';
+    } else {
+      callName = '${node.type}.${node.target.name}';
+    }
+    String args = node.arguments.map(visitExpression).join(', ');
+    return "new $callName($args)";
+  }
 
   String visitConstant(Constant node) {
     return "${node.value}";