cps-ir: Add support for intercepted calls.

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

Index: pkg/compiler/lib/src/js_backend/codegen/glue.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/glue.dart b/pkg/compiler/lib/src/js_backend/codegen/glue.dart
index 8bc79b2203ba74664cde974c8975d11902cf257f..d15a458819ee88c8fc6aa7400cbdffaa95629223 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/glue.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/glue.dart
@@ -11,7 +11,6 @@ import '../../js/js.dart' as js;
 import '../../constants/values.dart';
 import '../../elements/elements.dart';
 import '../../constants/expressions.dart';
-import 'task.dart' show CpsTypeEnvironment;
 
 /// Encapsulates the dependencies of the function-compiler to the compiler,
 /// backend and emitter.
@@ -63,8 +62,21 @@ class Glue {
     return _namer.invocationName(selector);
   }
 
-  bool isIntercepted(Selector selector) {
+  FunctionElement get getInterceptorMethod => _backend.getInterceptorMethod;
+
+  void registerUseInterceptorInCodegen() {
+    _backend.registerUseInterceptor(_compiler.enqueuer.codegen);
+  }
+
+  bool isInterceptedSelector(Selector selector) {
     return _backend.isInterceptedSelector(selector);
   }
 
+  Set<ClassElement> getInterceptedClassesOn(Selector selector) {
+    return _backend.getInterceptedClassesOn(selector.name);
+  }
+
+  void registerSpecializedGetInterceptor(Set<ClassElement> classes) {
+    _backend.registerSpecializedGetInterceptor(classes);
+  }
 }