cps-ir: Support foreign code.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library code_generator;
 
 import 'glue.dart';
 
 import '../../tree_ir/tree_ir_nodes.dart' as tree_ir;
 import '../../js/js.dart' as js;
@@ skipping 591 matching lines @@
   js.Expression visitCreateInvocationMirror(
       tree_ir.CreateInvocationMirror node) {
     js.Expression name = js.string(node.selector.name);
     js.Expression internalName = js.string(glue.invocationName(node.selector));
     js.Expression kind = js.number(node.selector.invocationMirrorKind);
     js.Expression arguments = new js.ArrayInitializer(
         visitExpressionList(node.arguments));
     js.Expression argumentNames = new js.ArrayInitializer(
         node.selector.namedArguments.map(js.string).toList(growable: false));
     return buildStaticHelperInvocation(glue.createInvocationMirrorMethod,
-        [name, internalName, kind, arguments, argumentNames]);
+        <js.Expression>[name, internalName, kind, arguments, argumentNames]);
   }
 
   @override
   js.Expression visitGetField(tree_ir.GetField node) {
     return new js.PropertyAccess.field(
         visitExpression(node.object),
         glue.instanceFieldPropertyName(node.field));
   }
 
   @override
@@ skipping 65 matching lines @@
           [visitExpression(node.target), index]);
     }
   }
 
   @override
   js.Expression visitTypeExpression(tree_ir.TypeExpression node) {
     List<js.Expression> arguments = visitExpressionList(node.arguments);
     return glue.generateTypeRepresentation(node.dartType, arguments);
   }
 
+  js.Node handleForeignCode(tree_ir.ForeignCode node) {
+    registry.registerStaticUse(node.dependency);
+    return node.codeTemplate.instantiate(visitExpressionList(node.arguments));
+  }
+
+  @override
+  js.Expression visitForeignExpression(tree_ir.ForeignExpression node) {
+    return handleForeignCode(node);
+  }
+
+  @override
+  visitForeignStatement(tree_ir.ForeignStatement node) {
+    return handleForeignCode(node);
+  }
+
   visitFunctionExpression(tree_ir.FunctionExpression node) {
     // FunctionExpressions are currently unused.
     // We might need them if we want to emit raw JS nested functions.
     throw 'FunctionExpressions should not be used';
   }
 }