diff --git a/pkg/dev_compiler/lib/src/kernel/compiler.dart b/pkg/dev_compiler/lib/src/kernel/compiler.dart
index 9d8f3e6f977..f92a431ddf3 100644
--- a/pkg/dev_compiler/lib/src/kernel/compiler.dart
+++ b/pkg/dev_compiler/lib/src/kernel/compiler.dart
@@ -6135,13 +6135,18 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
       var typeArgs = node.arguments.types;
       var name = target.name.text;
 
-      if (args.isEmpty && typeArgs.length == 1) {
-        if (name == 'TYPE_REF') {
-          return _emitType(typeArgs.single);
+      if (args.isEmpty) {
+        if (typeArgs.isEmpty && name == 'DART_RUNTIME_LIBRARY') {
+          return _runtimeModule;
         }
-        if (name == 'LEGACY_TYPE_REF') {
-          return _emitType(
-              typeArgs.single.withDeclaredNullability(Nullability.legacy));
+        if (typeArgs.length == 1) {
+          if (name == 'TYPE_REF') {
+            return _emitType(typeArgs.single);
+          }
+          if (name == 'LEGACY_TYPE_REF') {
+            return _emitType(
+                typeArgs.single.withDeclaredNullability(Nullability.legacy));
+          }
         }
       }
 
diff --git a/pkg/dev_compiler/lib/src/kernel/compiler_new.dart b/pkg/dev_compiler/lib/src/kernel/compiler_new.dart
index f5f29023abe..09ae291b433 100644
--- a/pkg/dev_compiler/lib/src/kernel/compiler_new.dart
+++ b/pkg/dev_compiler/lib/src/kernel/compiler_new.dart
@@ -6215,16 +6215,20 @@ class LibraryCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
       var typeArgs = node.arguments.types;
       var name = target.name.text;
 
-      if (args.isEmpty && typeArgs.length == 1) {
-        if (name == 'TYPE_REF') {
-          return _emitType(typeArgs.single);
+      if (args.isEmpty) {
+        if (typeArgs.isEmpty && name == 'DART_RUNTIME_LIBRARY') {
+          return _runtimeModule;
         }
-        if (name == 'LEGACY_TYPE_REF') {
-          return _emitType(
-              typeArgs.single.withDeclaredNullability(Nullability.legacy));
+        if (typeArgs.length == 1) {
+          if (name == 'TYPE_REF') {
+            return _emitType(typeArgs.single);
+          }
+          if (name == 'LEGACY_TYPE_REF') {
+            return _emitType(
+                typeArgs.single.withDeclaredNullability(Nullability.legacy));
+          }
         }
       }
-
       if (args.length == 1) {
         if (name == 'getInterceptor') {
           var argExpression = args.single.accept(this);
diff --git a/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart b/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart
index 270936439d7..5f8e6abf539 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart
@@ -9,6 +9,7 @@ import 'dart:async';
 import 'dart:_debugger' show stackTraceMapper, trackCall;
 import 'dart:_foreign_helper'
     show
+        DART_RUNTIME_LIBRARY,
         JS,
         JS_CLASS_REF,
         JS_EMBEDDED_GLOBAL,
@@ -182,7 +183,7 @@ final Object global_ = JS('', '''
 ''');
 
 void trackProfile(bool flag) {
-  JS('', 'dart.__trackProfile = #', flag);
+  JS('', '#.__trackProfile = #', DART_RUNTIME_LIBRARY(), flag);
 }
 
 final JsSymbol = JS('', 'Symbol');
@@ -208,7 +209,7 @@ final hOP = JS('!', '#.Object.prototype.hasOwnProperty', global_);
 ///
 ///     const my_library = Object.create(dart.library);
 ///
-Object libraryPrototype = JS('', 'dart.library');
+Object libraryPrototype = JS('', '#.library', DART_RUNTIME_LIBRARY());
 
 // TODO(vsm): Remove once this flag we've removed the ability to
 // whitelist / fallback on the old behavior.
diff --git a/sdk/lib/_internal/js_dev_runtime/private/debugger.dart b/sdk/lib/_internal/js_dev_runtime/private/debugger.dart
index 8840907c123..7451af19ab2 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/debugger.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/debugger.dart
@@ -7,7 +7,8 @@ library dart._debugger;
 import 'dart:_foreign_helper' show JS;
 import 'dart:_interceptors' show JSArray;
 import 'dart:_js_helper' show InternalMap, jsObjectGetPrototypeOf;
-import 'dart:_foreign_helper' show JS_GET_FLAG, JS_GET_NAME;
+import 'dart:_foreign_helper'
+    show DART_RUNTIME_LIBRARY, JS_GET_FLAG, JS_GET_NAME;
 import 'dart:_js_shared_embedded_names' show JsGetName;
 import 'dart:_runtime' as dart;
 import 'dart:core';
diff --git a/sdk/lib/_internal/js_dev_runtime/private/foreign_helper.dart b/sdk/lib/_internal/js_dev_runtime/private/foreign_helper.dart
index 45679392497..cda86db334c 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/foreign_helper.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/foreign_helper.dart
@@ -335,3 +335,8 @@ external String JS_STRING_CONCAT(String a, String b);
 /// JavaScript.
 @notNull
 external Object JS_CLASS_REF(Type type);
+
+/// Identifier used to access the dart:_runtime library object in the calling
+/// context.
+@notNull
+external Object DART_RUNTIME_LIBRARY();
diff --git a/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart b/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart
index a53419ea332..af12e60c73a 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart
@@ -7,7 +7,8 @@ library dart._js_helper;
 import 'dart:async' show Zone;
 import 'dart:collection';
 
-import 'dart:_foreign_helper' show JS, JS_CLASS_REF, JS_GET_FLAG, JSExportName;
+import 'dart:_foreign_helper'
+    show DART_RUNTIME_LIBRAY, JS, JS_CLASS_REF, JS_GET_FLAG, JSExportName;
 
 import 'dart:_interceptors';
 import 'dart:_internal'
diff --git a/sdk/lib/_internal/js_dev_runtime/private/js_rti.dart b/sdk/lib/_internal/js_dev_runtime/private/js_rti.dart
index 483e721d286..56b290fe6cd 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/js_rti.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/js_rti.dart
@@ -4,11 +4,6 @@
 
 part of dart._js_helper;
 
-// TODO(leafp): Maybe get rid of this?  Currently used by the interceptors
-// library, but that should probably be culled as well.
-Type? getRuntimeType(object) =>
-    JS('Type|null', 'dart.getReifiedType(#)', object);
-
 /// Returns the property [index] of the JavaScript array [array].
 getIndex(array, int index) {
   assert(isJsArray(array));
diff --git a/sdk/lib/_internal/js_dev_runtime/private/profile.dart b/sdk/lib/_internal/js_dev_runtime/private/profile.dart
index ede43638034..943158c54f9 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/profile.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/profile.dart
@@ -106,7 +106,8 @@ clearDynamicStats() {
 
 // We need to set this property while the sdk is only partially initialized
 // so we cannot use a regular Dart field.
-bool get _trackProfile => JS<bool>('!', 'dart.__trackProfile');
+bool get _trackProfile =>
+    JS<bool>('!', '#.__trackProfile', DART_RUNTIME_LIBRARY());
 
 trackCall(obj) {
   if (JS<bool>('!', '!#', _trackProfile)) return;