Add js-interop support to the fast-startup emitter

pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart2js.js_emitter.startup_emitter.model_emitter;
 
 /// The name of the property that stores the tear-off getter on a static
 /// function.
 ///
 /// This property is only used when isolates are used.
@@ skipping 327 matching lines @@
 // Creates lazy getters for statics that must run initializers on first access.
 #lazyStatics;
 
 // Emits the embedded globals.
 #embeddedGlobals;
 
 // Sets up the native support.
 // Native-support uses setOrUpdateInterceptorsByTag and setOrUpdateLeafTags.
 #nativeSupport;
 
+// Sets up the js-interop support.
+#jsInteropSupport;
+
 // Invokes main (making sure that it records the 'current-script' value).
 #invokeMain;
 })()
 ''';
 
 /// An expression that returns `true` if `__proto__` can be assigned to stitch
 /// together a prototype chain, and the performance is good.
 const String directAccessTestExpression = r'''
   (function () {
     var cls = function () {};
@@ skipping 132 matching lines @@
       'inheritance': emitInheritance(fragment),
       'aliases': emitInstanceMethodAliases(fragment),
       'tearOffs': emitInstallTearOffs(fragment),
       'constants': emitConstants(fragment),
       'staticNonFinalFields': emitStaticNonFinalFields(fragment),
       'lazyStatics': emitLazilyInitializedStatics(fragment),
       'embeddedGlobals': emitEmbeddedGlobals(program, deferredLoadHashes),
       'nativeSupport': program.needsNativeSupport
           ? emitNativeSupport(fragment)
           : new js.EmptyStatement(),
+      'jsInteropSupport': backend.jsInteropAnalysis.enabledJsInterop
+          ? backend.jsInteropAnalysis.buildJsInteropBootstrap()
+          : new js.EmptyStatement(),
       'invokeMain': fragment.invokeMain,
     });
   }
 
   js.Expression emitDeferredFragment(DeferredFragment fragment,
       js.Expression deferredTypes, List<Holder> holders) {
     List<Holder> nonStaticStateHolders = holders
         .where((Holder holder) => !holder.isStaticStateHolder)
         .toList(growable: false);
 
@@ skipping 849 matching lines @@
     }
     statements.add(js.js.statement("setOrUpdateInterceptorsByTag(#);",
         js.objectLiteral(interceptorsByTag)));
     statements.add(
         js.js.statement("setOrUpdateLeafTags(#);", js.objectLiteral(leafTags)));
     statements.add(subclassAssignment);
 
     return new js.Block(statements);
   }
 }