Allow intercepted calls to have typed selectors.

sdk/lib/_internal/compiler/implementation/js_backend/backend.dart

Index: sdk/lib/_internal/compiler/implementation/js_backend/backend.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/js_backend/backend.dart	(revision 18140)
+++ sdk/lib/_internal/compiler/implementation/js_backend/backend.dart	(working copy)
@@ -1119,17 +1119,23 @@
       return const SourceString('malformedTypeCheck');
     } else if (type == compiler.types.voidType) {
       return const SourceString('voidTypeCheck');
-    } else if (element == compiler.stringClass) {
+    } else if (element == jsStringClass
+               || element == compiler.stringClass) {
       return const SourceString('stringTypeCheck');
-    } else if (element == compiler.doubleClass) {
+    } else if (element == jsDoubleClass
+               || element == compiler.doubleClass) {
       return const SourceString('doubleTypeCheck');
-    } else if (element == compiler.numClass) {
+    } else if (element == jsNumberClass
+               || element == compiler.numClass) {
       return const SourceString('numTypeCheck');
-    } else if (element == compiler.boolClass) {
+    } else if (element == jsBoolClass
+               || element == compiler.boolClass) {
       return const SourceString('boolTypeCheck');
-    } else if (element == compiler.functionClass) {
+    } else if (element == jsFunctionClass
+               || element == compiler.functionClass) {
       return const SourceString('functionTypeCheck');
-    } else if (element == compiler.intClass) {
+    } else if (element == jsIntClass
+               || element == compiler.intClass) {
       return const SourceString('intTypeCheck');
     } else if (Elements.isNumberOrStringSupertype(element, compiler)) {
       return nativeCheck
@@ -1139,7 +1145,8 @@
       return nativeCheck
           ? const SourceString('stringSuperNativeTypeCheck')
           : const SourceString('stringSuperTypeCheck');
-    } else if (identical(element, compiler.listClass)) {
+    } else if (element == compiler.listClass
+               || element == jsArrayClass) {
       return const SourceString('listTypeCheck');
     } else {
       if (Elements.isListSupertype(element, compiler)) {