Remove unused support for disabling error messages

pkg/analyzer/lib/src/generated/resolver.dart

 // Copyright (c) 2014, 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 engine.resolver;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/scanner.dart';
 
@@ skipping 9728 matching lines @@
   /**
    * The static variables and fields that have an initializer. These are the
    * variables that need to be re-resolved after static variables have their
    * types inferred. A subset of these variables are those whose types should
    * be inferred. The list will be empty unless the resolver is being run in
    * strong mode.
    */
   final List<VariableElement> variablesAndFields = <VariableElement>[];
 
   /**
-   * A flag indicating whether we should discard errors while resolving the
-   * initializer for variable declarations. We do this for top-level variables
-   * and fields because their initializer will be re-resolved at a later time.
-   */
-  bool discardErrorsInInitializer = false;
-
-  /**
    * Initialize a newly created visitor to resolve the nodes in an AST node.
    *
    * The [definingLibrary] is the element for the library containing the node
    * being visited. The [source] is the source representing the compilation unit
    * containing the node being visited. The [typeProvider] is the object used to
    * access the types from the core library. The [errorListener] is the error
    * listener that will be informed of any errors that are found during
    * resolution. The [nameScope] is the scope used to resolve identifiers in the
    * node that will first be visited.  If `null` or unspecified, a new
    * [LibraryScope] will be created based on [definingLibrary] and
    * [typeProvider]. The [inheritanceManager] is used to perform inheritance
    * lookups.  If `null` or unspecified, a new [InheritanceManager] will be
    * created based on [definingLibrary]. The [typeAnalyzerFactory] is used to
    * create the type analyzer.  If `null` or unspecified, a type analyzer of
    * type [StaticTypeAnalyzer] will be created.
    */
   PartialResolverVisitor(LibraryElement definingLibrary, Source source,
       TypeProvider typeProvider, AnalysisErrorListener errorListener,
       {Scope nameScope,
       InheritanceManager inheritanceManager,
       StaticTypeAnalyzerFactory typeAnalyzerFactory})
       : strongMode = definingLibrary.context.analysisOptions.strongMode,
-        super(definingLibrary, source, typeProvider,
-            new DisablableErrorListener(errorListener));
+        super(definingLibrary, source, typeProvider, errorListener);
 
   @override
   Object visitBlockFunctionBody(BlockFunctionBody node) {
     if (_shouldBeSkipped(node)) {
       return null;
     }
     return super.visitBlockFunctionBody(node);
   }
 
   @override
   Object visitExpressionFunctionBody(ExpressionFunctionBody node) {
     if (_shouldBeSkipped(node)) {
       return null;
     }
     return super.visitExpressionFunctionBody(node);
   }
 
   @override
   Object visitFieldDeclaration(FieldDeclaration node) {
     if (strongMode && node.isStatic) {
       _addVariables(node.fields.variables);
-      bool wasDiscarding = discardErrorsInInitializer;
-      discardErrorsInInitializer = true;
-      try {
-        return super.visitFieldDeclaration(node);
-      } finally {
-        discardErrorsInInitializer = wasDiscarding;
-      }
     }
     return super.visitFieldDeclaration(node);
   }
 
   @override
   Object visitNode(AstNode node) {
-    if (discardErrorsInInitializer) {
-      AstNode parent = node.parent;
-      if (parent is VariableDeclaration && parent.initializer == node) {
-        DisablableErrorListener listener = errorListener;
-        return listener.disableWhile(() => super.visitNode(node));
-      }
-    }
     return super.visitNode(node);
   }
 
   @override
   Object visitTopLevelVariableDeclaration(TopLevelVariableDeclaration node) {
     if (strongMode) {
       _addVariables(node.variables.variables);
-      bool wasDiscarding = discardErrorsInInitializer;
-      discardErrorsInInitializer = true;
-      try {
-        return super.visitTopLevelVariableDeclaration(node);
-      } finally {
-        discardErrorsInInitializer = wasDiscarding;
-      }
     }
     return super.visitTopLevelVariableDeclaration(node);
   }
 
   /**
    * Add all of the [variables] with initializers to the list of variables whose
    * type can be inferred. Technically, we only infer the types of variables
    * that do not have a static type, but all variables with initializers
    * potentially need to be re-resolved after inference because they might
    * refer to a field whose type was inferred.
@@ skipping 6224 matching lines @@
     nonFields.add(node);
     return null;
   }
 
   @override
   Object visitNode(AstNode node) => node.accept(TypeResolverVisitor_this);
 
   @override
   Object visitWithClause(WithClause node) => null;
 }