Remove unused API.

dart/sdk/lib/_internal/compiler/implementation/closure.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 closureToClassMapper;
 
 import "elements/elements.dart";
 import "dart2jslib.dart";
 import "dart_types.dart";
 import "scanner/scannerlib.dart" show Token;
@@ skipping 179 matching lines @@
 
   DartType computeType(Compiler compiler) => compiler.types.dynamicType;
 
   // Since there is no declaration corresponding to 'this', use the position of
   // the enclosing method.
   Token position() => enclosingElement.position();
 
   accept(ElementVisitor visitor) => visitor.visitThisElement(this);
 }
 
-// TODO(ahe): These classes continuously cause problems.  We need to
-// move these classes to elements/modelx.dart or see if we can find a
-// more general solution.
-class CheckVariableElement extends ElementX {
-  Element parameter;
-  CheckVariableElement(String name, this.parameter, Element enclosing)
-      : super(name, ElementKind.VARIABLE, enclosing);
-
-  DartType computeType(Compiler compiler) => compiler.types.dynamicType;
-
-  // Since there is no declaration for the synthetic 'check' variable, use
-  // parameter.
-  Token position() => parameter.position();
-
-  accept(ElementVisitor visitor) => visitor.visitCheckVariableElement(this);
-}
-
 // The box-element for a scope, and the captured variables that need to be
 // stored in the box.
 class ClosureScope {
   Element boxElement;
   Map<Element, Element> capturedVariableMapping;
   // If the scope is attached to a [For] contains the variables that are
   // declared in the initializer of the [For] and that need to be boxed.
   // Otherwise contains the empty List.
   List<Element> boxedLoopVariables;
 
@@ skipping 37 matching lines @@
                   this.closureClassElement,
                   this.callElement,
                   this.thisElement)
       : this.freeVariableMapping = new Map<Element, Element>(),
         this.capturedFieldMapping = new Map<Element, Element>(),
         this.capturingScopes = new Map<Node, ClosureScope>(),
         this.usedVariablesInTry = new Set<Element>();
 
   bool isClosure() => closureElement != null;
 
-  bool isVariableCaptured(Element element) {
-    return freeVariableMapping.containsKey(element)
-        || capturingScopesBox(element);
-  }
-
   bool capturingScopesBox(Element element) {
     return capturingScopes.values.any((scope) {
       return scope.boxedLoopVariables.contains(element);
     });
   }
 
   bool isVariableBoxed(Element element) {
     Element copy = freeVariableMapping[element];
     if (copy != null && !copy.isMember()) return true;
     return capturingScopesBox(element);
@@ skipping 11 matching lines @@
 
   void forEachBoxedVariable(void f(Element local, Element field)) {
     freeVariableMapping.forEach((variable, copy) {
       if (!isVariableBoxed(variable)) return;
       f(variable, copy);
     });
     capturingScopes.values.forEach((scope) {
       scope.capturedVariableMapping.forEach(f);
     });
   }
-
-  void forEachNonBoxedCapturedVariable(void f(Element local, Element field)) {
-    freeVariableMapping.forEach((variable, copy) {
-      if (variable is BoxElement) return;
-      if (isVariableBoxed(variable)) return;
-      f(variable, copy);
-    });
-  }
 }
 
 class ClosureTranslator extends Visitor {
   final Compiler compiler;
   final TreeElements elements;
   int closureFieldCounter = 0;
   int boxedFieldCounter = 0;
   bool inTryStatement = false;
   final Map<Node, ClosureClassMap> closureMappingCache;
 
@@ skipping 512 matching lines @@
   }
 
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
     bool oldInTryStatement = inTryStatement;
     inTryStatement = true;
     node.visitChildren(this);
     inTryStatement = oldInTryStatement;
   }
 }