| Index: sdk/lib/_internal/compiler/implementation/js_backend/backend.dart | 
| diff --git a/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart b/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart | 
| index 31b382dea9fb5b319cbad6d6141fb4b6e744418e..02e78b7fce8abee9707e54097758e1a4a53054b1 100644 | 
| --- a/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart | 
| +++ b/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart | 
| @@ -195,6 +195,7 @@ class JavaScriptBackend extends Backend { | 
| ClassElement jsExtendableArrayClass; | 
|  | 
| Element jsIndexableLength; | 
| +  Element jsArrayTypedConstructor; | 
| Element jsArrayRemoveLast; | 
| Element jsArrayAdd; | 
| Element jsStringSplit; | 
| @@ -616,6 +617,7 @@ class JavaScriptBackend extends Backend { | 
| } | 
|  | 
| jsArrayClass.ensureResolved(compiler); | 
| +    jsArrayTypedConstructor = compiler.lookupElementIn(jsArrayClass, 'typed'); | 
| jsArrayRemoveLast = compiler.lookupElementIn(jsArrayClass, 'removeLast'); | 
| jsArrayAdd = compiler.lookupElementIn(jsArrayClass, 'add'); | 
|  | 
|  |