Re-enable support for --disallow-unsafe-eval.

sdk/lib/_internal/compiler/implementation/js_backend/backend.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 js_backend;
 
 typedef void Recompile(Element element);
 
 class ReturnInfo {
   HType returnType;
@@ skipping 720 matching lines @@
         invalidateAfterCodegen = new List<Element>(),
         usedInterceptors = new Set<Selector>(),
         oneShotInterceptors = new Map<String, Selector>(),
         interceptedElements = new Map<SourceString, Set<Element>>(),
         rti = new RuntimeTypeInformation(compiler),
         specializedGetInterceptors =
             new Map<String, Collection<ClassElement>>(),
         interceptedClasses = new LinkedHashMap<ClassElement, ClassElement>(),
         super(compiler, JAVA_SCRIPT_CONSTANT_SYSTEM) {
     emitter = disableEval
-        // TODO(8522): Restore --disallow-unsafe-eval.
-        ? null // new CodeEmitterNoEvalTask(compiler, namer, generateSourceMap)
+        ? new CodeEmitterNoEvalTask(compiler, namer, generateSourceMap)
         : new CodeEmitterTask(compiler, namer, generateSourceMap);
     builder = new SsaBuilderTask(this);
     optimizer = new SsaOptimizerTask(this);
     generator = new SsaCodeGeneratorTask(this);
     argumentTypes = new ArgumentTypesRegistry(this);
     fieldTypes = new FieldTypesRegistry(this);
   }
 
   static Namer determineNamer(Compiler compiler) {
     return compiler.enableMinification ?
@@ skipping 745 matching lines @@
    *
    * Invariant: [element] must be a declaration element.
    */
   void eagerRecompile(Element element) {
     assert(invariant(element, element.isDeclaration));
     generatedCode.remove(element);
     generatedBailoutCode.remove(element);
     compiler.enqueuer.codegen.addToWorkList(element);
   }
 }