Clean up operator names.

dart/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 {
@@ skipping 93 matching lines @@
       // If a library name does not start with the [LIBRARY_PREFIX] then our
       // assumptions about clashing with mangled private members do not hold.
       assert(libName.startsWith(LIBRARY_PREFIX));
       return '_$libName$nameString';
     } else {
       return name.slowToString();
     }
   }
 
   String instanceMethodName(FunctionElement element) {
-    SourceString name = element.name;
+    SourceString name = Elements.operatorNameToIdentifier(element.name);
     LibraryElement lib = element.getLibrary();
     if (element.kind == ElementKind.GENERATIVE_CONSTRUCTOR_BODY) {
       ConstructorBodyElement bodyElement = element;
       name = bodyElement.constructor.name;
     }
     FunctionSignature signature = element.computeSignature(compiler);
     String methodName =
         '${privateName(lib, name)}\$${signature.parameterCount}';
     if (!signature.optionalParametersAreNamed) {
       return methodName;
     } else if (!signature.optionalParameters.isEmpty) {
       StringBuffer buffer = new StringBuffer();
       signature.orderedOptionalParameters.forEach((Element element) {
         buffer.add('\$${JsNames.getValid(element.name.slowToString())}');
       });
       return '$methodName$buffer';
     }
   }
 
   String publicInstanceMethodNameByArity(SourceString name, int arity) {
+    name = Elements.operatorNameToIdentifier(name);
     assert(!name.isPrivate());
     return '${name.slowToString()}\$$arity';
   }
 
   String instanceMethodInvocationName(LibraryElement lib, SourceString name,
                                       Selector selector) {
+    name = Elements.operatorNameToIdentifier(name);
     // TODO(floitsch): mangle, while preserving uniqueness.
     StringBuffer buffer = new StringBuffer();
     List<SourceString> names = selector.getOrderedNamedArguments();
     for (SourceString argumentName in names) {
       buffer.add(r'$');
       argumentName.printOn(buffer);
     }
     return '${privateName(lib, name)}\$${selector.argumentCount}$buffer';
   }
 
@@ skipping 173 matching lines @@
   }
 
   String safeName(String name) {
     if (jsReserved.contains(name) || name.startsWith('\$')) {
       name = "\$$name";
       assert(!jsReserved.contains(name));
     }
     return name;
   }
 }