Fix 56 hints in pkg/compiler

pkg/compiler/lib/src/resolution/members.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.
 
 part of resolution;
 
 abstract class TreeElements {
   AnalyzableElement get analyzedElement;
   Iterable<Node> get superUses;
 
@@ skipping 1594 matching lines @@
         checkForDuplicateInitializers(initializingFormal.fieldElement,
                                       element.initializer);
       }
     });
 
     if (functionNode.initializers == null) {
       initializers = const Link<Node>();
     } else {
       initializers = functionNode.initializers.nodes;
     }
-    FunctionElement result;
     bool resolvedSuper = false;
     for (Link<Node> link = initializers; !link.isEmpty; link = link.tail) {
       if (link.head.asSendSet() != null) {
         final SendSet init = link.head.asSendSet();
         resolveFieldInitializer(constructor, init);
       } else if (link.head.asSend() != null) {
         final Send call = link.head.asSend();
         if (call.argumentsNode == null) {
           error(link.head, MessageKind.INVALID_INITIALIZER);
           continue;
@@ skipping 2183 matching lines @@
         warning(element.label, MessageKind.UNUSED_LABEL,
                 {'labelName': labelName});
       }
     });
     if (!targetElement.isTarget) {
       registry.undefineTarget(body);
     }
   }
 
   visitLiteralMap(LiteralMap node) {
-    bool oldSendIsMemberAccess = sendIsMemberAccess;
     sendIsMemberAccess = false;
 
     NodeList arguments = node.typeArguments;
     DartType keyTypeArgument;
     DartType valueTypeArgument;
     if (arguments != null) {
       Link<Node> nodes = arguments.nodes;
       if (nodes.isEmpty) {
         // The syntax [: <>{} :] is not allowed.
         error(arguments, MessageKind.MISSING_TYPE_ARGUMENT);
@@ skipping 53 matching lines @@
     return objectConstant.type;
   }
 
   bool overridesEquals(DartType type) {
     ClassElement cls = type.element;
     Element equals = cls.lookupMember('==');
     return equals.enclosingClass != compiler.objectClass;
   }
 
   void checkCaseExpressions(SwitchStatement node) {
-    JumpTarget breakElement = getOrDefineTarget(node);
-    Map<String, LabelDefinition> continueLabels = <String, LabelDefinition>{};
-
-    Link<Node> cases = node.cases.nodes;
     CaseMatch firstCase = null;
     DartType firstCaseType = null;
     bool hasReportedProblem = false;
 
     for (Link<Node> cases = node.cases.nodes;
          !cases.isEmpty;
          cases = cases.tail) {
       SwitchCase switchCase = cases.head;
 
       for (Node labelOrCase in switchCase.labelsAndCases) {
@@ skipping 601 matching lines @@
         new Modifiers.withFlags(new NodeList.empty(), Modifiers.FLAG_ABSTRACT));
     // Create synthetic type variables for the mixin application.
     List<DartType> typeVariables = <DartType>[];
     element.typeVariables.forEach((TypeVariableType type) {
       TypeVariableElementX typeVariableElement = new TypeVariableElementX(
           type.name, mixinApplication, type.element.node);
       TypeVariableType typeVariable = new TypeVariableType(typeVariableElement);
       typeVariables.add(typeVariable);
     });
     // Setup bounds on the synthetic type variables.
-    List<DartType> link = typeVariables;
     int index = 0;
     element.typeVariables.forEach((TypeVariableType type) {
       TypeVariableType typeVariable = typeVariables[index++];
       TypeVariableElementX typeVariableElement = typeVariable.element;
       typeVariableElement.typeCache = typeVariable;
       typeVariableElement.boundCache =
           type.element.bound.subst(typeVariables, element.typeVariables);
     });
     // Setup this and raw type for the mixin application.
     mixinApplication.computeThisAndRawType(compiler, typeVariables);
@@ skipping 672 matching lines @@
 }
 
 /// The result for the resolution of the `assert` method.
 class AssertResult implements ResolutionResult {
   const AssertResult();
 
   Element get element => null;
 
   String toString() => 'AssertResult()';
 }