Put constants in 'C', not '$'.

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

Index: dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart b/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
index 796718a952e1332d816ccf878f07482f20233575..cb2508c789d51231fcb23df91336c3a25bb82963 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js_backend/namer.dart
@@ -145,7 +145,10 @@ class Namer implements ClosureNamer {
     // These keywords trigger the loading of the java-plugin. For the
     // next-generation plugin, this results in starting a new Java process.
     "java", "Packages", "netscape", "sun", "JavaObject", "JavaClass",
-    "JavaArray", "JavaMember"
+    "JavaArray", "JavaMember",
+
+    // Global object for constants.
+    "C",
   ];
 
   Set<String> _jsReserved = null;
@@ -775,6 +778,8 @@ class Namer implements ClosureNamer {
     return "$CURRENT_ISOLATE.${getStaticClosureName(element)}";
   }
 
+  String globalObjectForConstant(Constant constant) => 'C';
+
   String operatorIsPrefix() => r'$is';
 
   String operatorAsPrefix() => r'$as';