Extract InterceptorData from JavaScriptBackend.

pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart

Index: pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
diff --git a/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart b/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
index 0e5d6811635f51d3f6ac92d7e21150936fb30274..0dc23cfc37ebd2db724eca5032a231ed3d9b7cda 100644
--- a/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
+++ b/pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart
@@ -81,7 +81,8 @@ class ParameterStubGenerator {
     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;