Fix bug with namer: use the same encoding for an instance method, whether it is an invocation or a …

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

 // Copyright (c) 2011, 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 js_backend;
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  */
 class Namer implements ClosureNamer {
@@ skipping 346 matching lines @@
       SourceString name = selector.name;
       if (selector.kind == SelectorKind.OPERATOR
           || selector.kind == SelectorKind.INDEX) {
         name = operatorNameToIdentifier(name);
         assert(name != selector.name);
         return getMappedOperatorName(name.slowToString());
       }
       assert(name == operatorNameToIdentifier(name));
       StringBuffer buffer = new StringBuffer();
       for (SourceString argumentName in selector.getOrderedNamedArguments()) {
-        buffer.write(r'$');
-        argumentName.printOn(buffer);
+        buffer.write('\$${safeName(argumentName.slowToString())}');
       }
       String suffix = '\$${selector.argumentCount}$buffer';
       // We don't mangle the closure invoking function name because it
       // is generated by string concatenation in applyFunction from
       // js_helper.dart.
       if (selector.isClosureCall()) {
         return "${name.slowToString()}$suffix";
       } else {
         String proposedName = privateName(selector.library, name);
         return getMappedInstanceName('$proposedName$suffix');
@@ skipping 746 matching lines @@
     hash = hash ^ (hash >> 6);
     return hash;
   }
 
   static int _finish(int hash) {
     hash = _MASK & (hash + (((_MASK >> 3) & hash) <<  3));
     hash = hash & (hash >> 11);
     return _MASK & (hash + (((_MASK >> 15) & hash) << 15));
   }
 }