Split InterceptorData

pkg/compiler/lib/src/ssa/nodes.dart

Index: pkg/compiler/lib/src/ssa/nodes.dart
diff --git a/pkg/compiler/lib/src/ssa/nodes.dart b/pkg/compiler/lib/src/ssa/nodes.dart
index 48d1a232104e322fdb4e063f61ee24c0b1c66da4..df84debec05353b06d1ae50f8300a4ca754b6c68 100644
--- a/pkg/compiler/lib/src/ssa/nodes.dart
+++ b/pkg/compiler/lib/src/ssa/nodes.dart
@@ -1728,7 +1728,7 @@ class HFieldGet extends HFieldAccess {
     // [HFieldGet].
     if (sourceElement is ThisLocal) {
       ThisLocal thisLocal = sourceElement;
-      return closedWorld.backendClasses
+      return closedWorld.interceptorData
           .isInterceptorClass(thisLocal.enclosingClass);
     }
     return false;
@@ -2374,7 +2374,7 @@ class HThis extends HParameterValue {
   bool isCodeMotionInvariant() => true;
 
   bool isInterceptor(ClosedWorld closedWorld) {
-    return closedWorld.backendClasses
+    return closedWorld.interceptorData
         .isInterceptorClass(sourceElement.enclosingClass);
   }