Compute frontend/backend specific constants.

sdk/lib/_internal/compiler/implementation/js_backend/custom_elements_analysis.dart

 // Copyright (c) 2013, 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.
 
 part of js_backend;
 
 /**
  * Support for Custom Elements.
  *
  * The support for custom elements the compiler builds a table that maps the
@@ skipping 145 matching lines @@
       if ((isNative && selectedClasses.contains(classElement)) ||
           (isExtension &&
               (allClassesSelected || selectedClasses.contains(classElement)))) {
         newActiveClasses.add(classElement);
         escapingConstructors(classElement).forEach(enqueuer.registerStaticUse);
         // Force the generaton of the type constant that is the key to an entry
         // in the generated table.
         Constant constant = makeTypeConstant(classElement);
         backend.registerCompileTimeConstant(
             constant, compiler.globalDependencies);
-        compiler.constantHandler.addCompileTimeConstantForEmission(constant);
+        backend.constants.addCompileTimeConstantForEmission(constant);
       }
     }
     activeClasses.addAll(newActiveClasses);
     instantiatedClasses.removeAll(newActiveClasses);
   }
 
   TypeConstant makeTypeConstant(ClassElement element) {
     DartType elementType = element.rawType;
     DartType constantType = backend.typeImplementation.rawType;
     return new TypeConstant(elementType, constantType);
@@ skipping 15 matching lines @@
           result.add(member);
         }
       }
     }
     classElement.forEachMember(selectGenerativeConstructors,
         includeBackendMembers: false,
         includeSuperAndInjectedMembers: false);
     return result;
   }
 }