Extract InterceptorData from JavaScriptBackend.

pkg/compiler/lib/src/js_emitter/parameter_stub_generator.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.parameter_stub_generator;
 
 import '../closure.dart' show ClosureClassElement;
 import '../common.dart';
 import '../compiler.dart' show Compiler;
 import '../constants/values.dart';
@@ skipping 63 matching lines @@
     if (parameters.optionalParametersAreNamed &&
         callStructure.namedArgumentCount == parameters.optionalParameterCount) {
       // If the selector has the same number of named arguments as the element,
       // we don't need to add a stub. The call site will hit the method
       // directly.
       return null;
     }
     JavaScriptConstantCompiler handler = backend.constants;
     List<String> names = callStructure.getOrderedNamedArguments();
 
-    bool isInterceptedMethod = backend.isInterceptedMethod(member);
+    bool isInterceptedMethod =
+        backend.interceptorData.isInterceptedMethod(member);
 
     // If the method is intercepted, we need to also pass the actual receiver.
     int extraArgumentCount = isInterceptedMethod ? 1 : 0;
     // Use '$receiver' to avoid clashes with other parameter names. Using
     // '$receiver' works because namer.safeVariableName used for getting
     // parameter names never returns a name beginning with a single '$'.
     String receiverArgumentName = r'$receiver';
 
     // The parameters that this stub takes.
     List<jsAst.Parameter> parametersBuffer =
@@ skipping 207 matching lines @@
             generateParameterStub(member, selector, null);
         if (stub != null) {
           stubs.add(stub);
         }
       }
     }
 
     return stubs;
   }
 }