Move IS_INDEXABLE_FIELD to JsGetName.

pkg/compiler/lib/src/ssa/builder.dart

Index: pkg/compiler/lib/src/ssa/builder.dart
diff --git a/pkg/compiler/lib/src/ssa/builder.dart b/pkg/compiler/lib/src/ssa/builder.dart
index 98b0fca06a91d66f9ba1160ca9a816e281cc19bf..b6e7b38b38e4868b055531c800dbd3aa35f93174 100644
--- a/pkg/compiler/lib/src/ssa/builder.dart
+++ b/pkg/compiler/lib/src/ssa/builder.dart
@@ -4258,10 +4258,6 @@ class SsaBuilder extends NewResolvedVisitor {
       handleForeignRawFunctionRef(node, 'RAW_DART_FUNCTION_REF');
     } else if (name == 'JS_SET_CURRENT_ISOLATE') {
       handleForeignSetCurrentIsolate(node);
-    } else if (name == 'JS_IS_INDEXABLE_FIELD_NAME') {
-      // TODO(floitsch): this should be a JS_NAME.
-      Element element = backend.findHelper('JavaScriptIndexingBehavior');
-      stack.add(addConstantString(backend.namer.operatorIs(element)));
     } else if (name == 'JS_CURRENT_ISOLATE') {
       handleForeignJsCurrentIsolate(node);
     } else if (name == 'JS_GET_NAME') {