Use entities in TypeVariableResolutionAnalysis and TypeVariableCodegenAnalysis

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

Index: pkg/compiler/lib/src/js_backend/backend.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend.dart b/pkg/compiler/lib/src/js_backend/backend.dart
index 409d88ef4c5350412eb5642c4f2a7360e1c2cf97..a49c63a77d04561f9e5d50028e728fd93bff42c2 100644
--- a/pkg/compiler/lib/src/js_backend/backend.dart
+++ b/pkg/compiler/lib/src/js_backend/backend.dart
@@ -904,8 +904,8 @@ class JavaScriptBackend {
   /// Creates an [Enqueuer] for code generation specific to this backend.
   CodegenEnqueuer createCodegenEnqueuer(
       CompilerTask task, Compiler compiler, ClosedWorld closedWorld) {
-    _typeVariableCodegenAnalysis =
-        new TypeVariableCodegenAnalysis(this, helpers, mirrorsData);
+    _typeVariableCodegenAnalysis = new TypeVariableCodegenAnalysis(
+        compiler.elementEnvironment, this, helpers, mirrorsData);
     _lookupMapAnalysis = new LookupMapAnalysis(
         reporter,
         constantSystem,