Incremental compilation of constants.

dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

Index: dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index 1df4a7925953472b42c0997d5c5af24b18615c4c..7f28e2b19657e4848df9d27d78bcd9468dd0d1fc 100644
--- a/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -1017,10 +1017,7 @@ class OldEmitter implements Emitter {
         if (cachedEmittedConstants.contains(constant)) continue;
         cachedEmittedConstants.add(constant);
       }
-      String name = namer.constantName(constant);
-      jsAst.Expression init = js('#.# = #',
-          [namer.globalObjectForConstant(constant), name,
-           constantInitializerExpression(constant)]);
+      jsAst.Expression init = buildConstantInitializer(constant);
       buffer.write(jsAst.prettyPrint(init, compiler,
                                      monitor: compiler.dumpInfoTask));
       buffer.write('$N');
@@ -1030,6 +1027,13 @@ class OldEmitter implements Emitter {
     }
   }
 
+  jsAst.Expression buildConstantInitializer(ConstantValue constant) {
+    String name = namer.constantName(constant);
+    return js('#.# = #',
+              [namer.globalObjectForConstant(constant), name,
+               constantInitializerExpression(constant)]);
+  }
+
   jsAst.Template get makeConstantListTemplate {
     // TODO(floitsch): there is no harm in caching the template.
     return jsAst.js.uncachedExpressionTemplate(