Merge CommonElements and BackendHelpers!

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

Index: pkg/compiler/lib/src/js_backend/minify_namer.dart
diff --git a/pkg/compiler/lib/src/js_backend/minify_namer.dart b/pkg/compiler/lib/src/js_backend/minify_namer.dart
index 3a5550cbbe81ba861f8d5580dc8f14dff4febdb2..a3d9ad5c940dde8c09c570151b3b83a174388154 100644
--- a/pkg/compiler/lib/src/js_backend/minify_namer.dart
+++ b/pkg/compiler/lib/src/js_backend/minify_namer.dart
@@ -12,9 +12,9 @@ class MinifyNamer extends Namer
         _MinifiedFieldNamer,
         _MinifyConstructorBodyNamer,
         _MinifiedOneShotInterceptorNamer {
-  MinifyNamer(BackendHelpers helpers, NativeData nativeData,
-      ClosedWorld closedWorld, CodegenWorldBuilder codegenWorldBuilder)
-      : super(helpers, nativeData, closedWorld, codegenWorldBuilder) {
+  MinifyNamer(NativeData nativeData, ClosedWorld closedWorld,
+      CodegenWorldBuilder codegenWorldBuilder)
+      : super(nativeData, closedWorld, codegenWorldBuilder) {
     reserveBackendNames();
     fieldRegistry = new _FieldNamingRegistry(this);
   }