Add operators test to source_mapping_test.

pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart

 // Copyright (c) 2014, 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 tree_ir_nodes;
 
-import '../constants/expressions.dart';
 import '../constants/values.dart' as values;
 import '../dart_types.dart' show DartType, InterfaceType, TypeVariableType;
 import '../elements/elements.dart';
 import '../io/source_information.dart' show SourceInformation;
 import '../types/types.dart' show TypeMask;
 import '../universe/universe.dart' show Selector;
 
 import '../cps_ir/builtin_operator.dart';
 export '../cps_ir/builtin_operator.dart';
 
@@ skipping 790 matching lines @@
   }
 
   accept1(ExpressionVisitor1 visitor, arg) {
     return visitor.visitCreateInvocationMirror(this, arg);
   }
 }
 
 class Interceptor extends Expression {
   Expression input;
   Set<ClassElement> interceptedClasses;
+  final SourceInformation sourceInformation;
 
-  Interceptor(this.input, this.interceptedClasses);
+  Interceptor(this.input, this.interceptedClasses, this.sourceInformation);
 
   accept(ExpressionVisitor visitor) {
     return visitor.visitInterceptor(this);
   }
 
   accept1(ExpressionVisitor1 visitor, arg) {
     return visitor.visitInterceptor(this, arg);
   }
 }
 
@@ skipping 622 matching lines @@
 
   /// Number of uses of the current fallthrough target.
   int get useCount => _stack.last.useCount;
 
   /// Indicate that a statement will fall through to the current fallthrough
   /// target.
   void use() {
     ++_stack.last.useCount;
   }
 }