Add type inference for break and continue statements.

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 '../fasta_codes.dart'
     show
         FastaMessage,
         codeConstFieldWithoutInitializer,
@@ skipping 2858 matching lines @@
     } else if (target == null ||
         target is! JumpTarget ||
         !target.isBreakTarget) {
       push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement(
           "Can't break to '$name'.", breakKeyword.next.charOffset));
     } else if (target.functionNestingLevel != functionNestingLevel) {
       push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement(
           "Can't break to '$name' in a different function.",
           breakKeyword.next.charOffset));
     } else {
-      BreakStatement statement = new BreakStatement(null)
+      BreakStatement statement = new KernelBreakStatement(null)
         ..fileOffset = breakKeyword.charOffset;
       target.addBreak(statement);
       push(statement);
     }
   }
 
   @override
   void handleContinueStatement(
       bool hasTarget, Token continueKeyword, Token endToken) {
     debugEvent("ContinueStatement");
@@ skipping 12 matching lines @@
         if (switchScope == null) {
           push(buildCompileTimeErrorStatement(
               "Can't find label '$name'.", continueKeyword.next.charOffset));
           return;
         }
         switchScope.forwardDeclareLabel(identifier.name,
             target = createGotoTarget(offsetForToken(identifier.token)));
       }
       if (target.isGotoTarget &&
           target.functionNestingLevel == functionNestingLevel) {
-        ContinueSwitchStatement statement = new ContinueSwitchStatement(null);
+        ContinueSwitchStatement statement =
+            new KernelContinueSwitchStatement(null);
         target.addGoto(statement);
         push(statement);
         return;
       }
     }
     if (target == null) {
       push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement(
           "No target of continue.", continueKeyword.charOffset));
     } else if (!target.isContinueTarget) {
       push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement(
           "Can't continue at '$name'.", continueKeyword.next.charOffset));
     } else if (target.functionNestingLevel != functionNestingLevel) {
       push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement(
           "Can't continue at '$name' in a different function.",
           continueKeyword.next.charOffset));
     } else {
-      BreakStatement statement = new BreakStatement(null)
+      BreakStatement statement = new KernelBreakStatement(null)
         ..fileOffset = continueKeyword.charOffset;
       target.addContinue(statement);
       push(statement);
     }
   }
 
   @override
   void endTypeVariable(Token token, Token extendsOrSuper) {
     debugEvent("TypeVariable");
     // TODO(ahe): Do not discard these when enabling generic method syntax.
@@ skipping 752 matching lines @@
     if (starToken == null) {
       return AsyncMarker.Async;
     } else {
       assert(identical(starToken.stringValue, "*"));
       return AsyncMarker.AsyncStar;
     }
   } else {
     return internalError("Unknown async modifier: $asyncToken");
   }
 }