Move hasRuntimeTypeSupport, hasIsolateSupport, and hasFunctionApplySupport to JavaScriptBackend.

pkg/compiler/lib/src/common/names.dart

Index: pkg/compiler/lib/src/common/names.dart
diff --git a/pkg/compiler/lib/src/common/names.dart b/pkg/compiler/lib/src/common/names.dart
index 06ef3607f37f1803fbbc9dd9087a00009f459e2a..715d8cf33916df996c3e2123f919f2d0532708e4 100644
--- a/pkg/compiler/lib/src/common/names.dart
+++ b/pkg/compiler/lib/src/common/names.dart
@@ -162,6 +162,9 @@ class Uris {
   /// The URI for 'dart:html'.
   static final Uri dart_html = new Uri(scheme: 'dart', path: 'html');
 
+  /// The URI for 'dart:isolate'.
+  static final Uri dart_isolate = new Uri(scheme: 'dart', path: 'isolate');
+
   /// The URI for 'dart:mirrors'.
   static final Uri dart_mirrors = new Uri(scheme: 'dart', path: 'mirrors');