Move RuntimeTypeInformation to its own library.

lib/compiler/implementation/universe/universe.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.
 
 #library('universe');
 
 #import('../closure.dart');
 #import('../elements/elements.dart');
 #import('../leg.dart');
 #import('../scanner/scannerlib.dart');
-// For RuntimeTypeInformation. TODO(ngeoffray): remove this dependency.
-#import('../ssa/ssa.dart');
+#import('../runtime_types.dart');
 #import('../tree/tree.dart');
 #import('../util/util.dart');
 
 #source('function_set.dart');
 #source('partial_type_tree.dart');
 #source('selector_map.dart');
 
 class Universe {
   /**
    * Documentation wanted -- johnniwinther
@@ skipping 502 matching lines @@
 
     if (!self.isInterface() && self.isSubclassOf(other)) {
       // Resolve an invocation of [element.name] on [self]. If it
       // is found, this selector is a candidate.
       return hasElementIn(self, element) && appliesUntyped(element, compiler);
     }
 
     return false;
   }
 }