Remove HRuntimeType implementation

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

Index: pkg/compiler/lib/src/js_backend/backend_helpers.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend_helpers.dart b/pkg/compiler/lib/src/js_backend/backend_helpers.dart
index 088c4de4d65aee2af298576129a765aa5f96a829..66251fc4d560b9e58c1824d9573738491a988c7c 100644
--- a/pkg/compiler/lib/src/js_backend/backend_helpers.dart
+++ b/pkg/compiler/lib/src/js_backend/backend_helpers.dart
@@ -612,6 +612,9 @@ class BackendHelpers {
 
   FunctionEntity get subtypeCast => _findHelperFunction('subtypeCast');
 
+  FunctionEntity get functionTypeTest =>

[floitsch, 2017/03/02 13:43:38]

It feels fishy that the helper is in no impact.
It turns out that others (like `functionTypeCheck`) will call this function
anyway, but that's not immediately obvious.

+      _findHelperFunction('functionTypeTest');
+
   FunctionEntity get checkSubtypeOfRuntimeType =>
       _findHelperFunction('checkSubtypeOfRuntimeType');
 
@@ -710,45 +713,6 @@ class BackendHelpers {
 
   ClassEntity get VoidRuntimeType => _findHelperClass('VoidRuntimeType');
 
-  ClassEntity get RuntimeType => _findHelperClass('RuntimeType');
-
-  ClassEntity get RuntimeFunctionType =>
-      _findHelperClass('RuntimeFunctionType');
-
-  ClassEntity get RuntimeTypePlain => _findHelperClass('RuntimeTypePlain');
-
-  ClassEntity get RuntimeTypeGeneric => _findHelperClass('RuntimeTypeGeneric');
-
-  ClassEntity get DynamicRuntimeType => _findHelperClass('DynamicRuntimeType');
-
-  FunctionEntity get getDynamicRuntimeType {
-    // TODO(johnniwinther): Support this in mocks.
-    return _env.lookupLibraryMember(jsHelperLibrary, 'getDynamicRuntimeType');
-  }
-
-  FunctionEntity get getVoidRuntimeType {
-    // TODO(johnniwinther): Support this in mocks.
-    return _env.lookupLibraryMember(jsHelperLibrary, 'getVoidRuntimeType');
-  }
-
-  FunctionEntity get buildInterfaceType {
-    // TODO(johnniwinther): Support this in mocks.
-    return _env.lookupLibraryMember(jsHelperLibrary, 'buildInterfaceType');
-  }
-
-  FunctionEntity get buildFunctionType {
-    // TODO(johnniwinther): Support this in mocks.
-    return _env.lookupLibraryMember(jsHelperLibrary, 'buildFunctionType');
-  }
-
-  FunctionEntity get buildNamedFunctionType {
-    // TODO(johnniwinther): Support this in mocks.
-    return _env.lookupLibraryMember(jsHelperLibrary, 'buildNamedFunctionType');
-  }
-
-  FunctionEntity get functionTypeTestMetaHelper =>
-      _findHelperFunction('functionTypeTestMetaHelper');
-
   FunctionEntity get defineProperty => _findHelperFunction('defineProperty');
 
   FunctionEntity get startRootIsolate =>