Move array and string related HType from const to a field in the backend.

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

 // Copyright (c) 2012, 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 dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 1276 matching lines @@
     String banner = 'compiler cancelled';
     return (reason != null) ? '$banner: $reason' : '$banner';
   }
 }
 
 class Tracer {
   final bool enabled = false;
 
   const Tracer();
 
-  void traceCompilation(String methodName, ItemCompilationContext context) {
+  void traceCompilation(String methodName,
+                        ItemCompilationContext context,
+                        Compiler compiler) {
   }
 
   void traceGraph(String name, var graph) {
   }
 
   void close() {
   }
 }
 
 class SourceSpan {
@@ skipping 57 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }