Access BackendUsage through ClosedWorld

pkg/compiler/lib/src/js_emitter/startup_emitter/model_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.
 
 library dart2js.js_emitter.startup_emitter.model_emitter;
 
 import 'dart:convert' show JsonEncoder;
 import 'dart:math' show Random;
 
 import 'package:js_runtime/shared/embedded_names.dart'
@@ skipping 75 matching lines @@
         compiler.backend.rtiNeed,
         compiler.backend.rtiEncoder,
         namer,
         task,
         this.generateConstantReference,
         constantListGenerator);
   }
 
   DiagnosticReporter get reporter => compiler.reporter;
 
-  InterceptorData get _interceptorData => _closedWorld.interceptorData;
-
   js.Expression constantListGenerator(js.Expression array) {
     // TODO(floitsch): remove hard-coded name.
     return js.js('makeConstList(#)', [array]);
   }
 
   js.Expression generateEmbeddedGlobalAccess(String global) {
     return js.js(generateEmbeddedGlobalAccessString(global));
   }
 
   String generateEmbeddedGlobalAccessString(String global) {
@@ skipping 50 matching lines @@
     return js.js('#.#',
         [namer.globalObjectForConstant(value), namer.constantName(value)]);
   }
 
   int emitProgram(Program program) {
     MainFragment mainFragment = program.fragments.first;
     List<DeferredFragment> deferredFragments =
         new List<DeferredFragment>.from(program.deferredFragments);
 
     FragmentEmitter fragmentEmitter = new FragmentEmitter(
-        compiler, namer, backend, constantEmitter, this, _interceptorData);
+        compiler, namer, backend, constantEmitter, this, _closedWorld);
 
     Map<DeferredFragment, _DeferredFragmentHash> deferredHashTokens =
         new Map<DeferredFragment, _DeferredFragmentHash>();
     for (DeferredFragment fragment in deferredFragments) {
       deferredHashTokens[fragment] = new _DeferredFragmentHash(fragment);
     }
 
     js.Statement mainCode =
         fragmentEmitter.emitMainFragment(program, deferredHashTokens);
 
@@ skipping 21 matching lines @@
     deferredHashTokens
         .forEach((DeferredFragment key, _DeferredFragmentHash token) {
       token.setHash(hunkHashes[key]);
     });
 
     writeMainFragment(mainFragment, mainCode,
         isSplit: program.deferredFragments.isNotEmpty ||
             program.hasSoftDeferredClasses ||
             compiler.options.experimentalTrackAllocations);
 
-    if (backend.backendUsage.requiresPreamble && !backend.htmlLibraryIsLoaded) {
+    if (_closedWorld.backendUsage.requiresPreamble &&
+        !backend.htmlLibraryIsLoaded) {
       reporter.reportHintMessage(NO_LOCATION_SPANNABLE, MessageKind.PREAMBLE);
     }
 
     if (compiler.options.deferredMapUri != null) {
       writeDeferredMap();
     }
 
     // Return the total program size.
     return outputBuffers.values.fold(0, (a, b) => a + b.length);
   }
@@ skipping 171 matching lines @@
     // data.
     mapping["_comment"] = "This mapping shows which compiled `.js` files are "
         "needed for a given deferred library import.";
     mapping.addAll(compiler.deferredLoadTask.computeDeferredMap());
     compiler.outputProvider(
         compiler.options.deferredMapUri.path, '', OutputType.info)
       ..add(const JsonEncoder.withIndent("  ").convert(mapping))
       ..close();
   }
 }