Move compile-time constant registrations to the backend.

sdk/lib/_internal/compiler/implementation/mirrors_used.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.
 
 library dart2js.mirrors_used;
 
 import 'dart2jslib.dart' show
     Compiler,
     CompilerTask,
     Constant,
@@ skipping 116 matching lines @@
             && librariesWithUsage.contains(library));
   }
 
   /// Call-back from the resolver to analyze MirorsUsed annotations. The result
   /// is stored in [analyzer] and later used to compute
   /// [:analyzer.mergedMirrorUsage:].
   void validate(NewExpression node, TreeElements mapping) {
     for (Node argument in node.send.arguments) {
       NamedArgument named = argument.asNamedArgument();
       if (named == null) continue;
-      Constant value = compiler.metadataHandler.compileNodeWithDefinitions(
+      Constant value = compiler.constantHandler.compileNodeWithDefinitions(
           named.expression, mapping, isConst: true);
 
       ConstantMapper mapper =
-          new ConstantMapper(compiler.metadataHandler, mapping, compiler);
+          new ConstantMapper(compiler.constantHandler, mapping, compiler);
       named.expression.accept(mapper);
 
       MirrorUsageBuilder builder =
           new MirrorUsageBuilder(
               analyzer, mapping.currentElement.getLibrary(), named.expression,
               value, mapper.constantToNodeMap);
 
       if (named.name.source == const SourceString('symbols')) {
         analyzer.cachedValues[value] =
             builder.convertToListOfStrings(
@@ skipping 438 matching lines @@
       // @MirrorsUsed(targets: fisk)
       //                       ^^^^
       //
       // Instead of saying 'fisk' should pretty print the problematic constant
       // value.
       return spannable;
     }
     return node;
   }
 }