more fasta event cleanup and testing

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

 // Copyright (c) 2016, 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 fasta.body_builder;
 
 import 'package:kernel/ast.dart'
     hide InvalidExpression, InvalidInitializer, InvalidStatement;
 
 import 'package:kernel/class_hierarchy.dart' show ClassHierarchy;
@@ skipping 2798 matching lines @@
       } else {
         scope.declareLabel(label.name, createGotoTarget(firstToken.charOffset));
       }
     }
     push(expressions);
     push(labels);
     enterLocalScope();
   }
 
   @override
-  void handleSwitchCase(
-      int labelCount,
-      int expressionCount,
-      Token defaultKeyword,
-      int statementCount,
-      Token firstToken,
-      Token endToken) {
+  void endSwitchCase(int labelCount, int expressionCount, Token defaultKeyword,
+      int statementCount, Token firstToken, Token endToken) {
     debugEvent("SwitchCase");
     // We always create a block here so that we later know that there's always
     // one synthetic block when we finish compiling the switch statement and
     // check this switch case to see if it falls through to the next case.
     Block block = popBlock(statementCount, firstToken);
     exitLocalScope();
     List<Label> labels = pop();
     List<Expression> expressions = pop();
     List<int> expressionOffsets = <int>[];
     for (Expression expression in expressions) {
@@ skipping 977 matching lines @@
       return AsyncMarker.Async;
     } else {
       assert(identical(starToken.stringValue, "*"));
       return AsyncMarker.AsyncStar;
     }
   } else {
     return unhandled(asyncToken.lexeme, "asyncMarkerFromTokens",
         asyncToken.charOffset, null);
   }
 }