Replace using runtimeType with 'is'.

pkg/analyzer/lib/src/generated/element.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.element;
 
 import 'dart:collection';
@@ skipping 1480 matching lines @@
    */
   void set types(List<ClassElement> types) {
     for (ClassElement type in types) {
       (type as ClassElementImpl).enclosingElement = this;
     }
     this._types = types;
   }
 
   @override
   bool operator ==(Object object) =>
-      object != null &&
-          runtimeType == object.runtimeType &&
-          source == (object as CompilationUnitElementImpl).source;
+      object is CompilationUnitElementImpl && source == object.source;
 
   @override
   accept(ElementVisitor visitor) => visitor.visitCompilationUnitElement(this);
 
   @override
   void appendTo(StringBuffer buffer) {
     if (source == null) {
       buffer.write("{compilation unit}");
     } else {
       buffer.write(source.fullName);
@@ skipping 3293 matching lines @@
       return 3;
     }
     visitedTypes.add(this);
     // Reference the arrays of parameters
     List<DartType> normalParameterTypes = this.normalParameterTypes;
     List<DartType> optionalParameterTypes = this.optionalParameterTypes;
     Iterable<DartType> namedParameterTypes = this.namedParameterTypes.values;
     // Generate the hashCode
     int code = (returnType as TypeImpl).internalHashCode(visitedTypes);
     for (int i = 0; i < normalParameterTypes.length; i++) {
-      code = (code << 1) + (normalParameterTypes[i] as TypeImpl).internalHashCode(visitedTypes);
+      code = (code << 1) +
+          (normalParameterTypes[i] as TypeImpl).internalHashCode(visitedTypes);
     }
     for (int i = 0; i < optionalParameterTypes.length; i++) {
-      code = (code << 1) + (optionalParameterTypes[i] as TypeImpl).internalHashCode(visitedTypes);
+      code = (code << 1) +
+          (optionalParameterTypes[i] as TypeImpl).internalHashCode(visitedTypes);
     }
     for (DartType type in namedParameterTypes) {
       code = (code << 1) + (type as TypeImpl).internalHashCode(visitedTypes);
     }
     return code;
   }
 
   @override
   Map<String, DartType> get namedParameterTypes {
     LinkedHashMap<String, DartType> namedParameterTypes =
@@ skipping 816 matching lines @@
       (script as HtmlScriptElementImpl).enclosingElement = this;
     }
     this._scripts = scripts;
   }
 
   @override
   bool operator ==(Object object) {
     if (identical(object, this)) {
       return true;
     }
-    if (object == null) {
-      return false;
-    }
-    return runtimeType == object.runtimeType &&
-        source == (object as HtmlElementImpl).source;
+    return object is HtmlElementImpl && source == object.source;
   }
 
   @override
   accept(ElementVisitor visitor) => visitor.visitHtmlElement(this);
 
   @override
   void appendTo(StringBuffer buffer) {
     if (source == null) {
       buffer.write("{HTML file}");
     } else {
@@ skipping 1915 matching lines @@
 
   @override
   List<LibraryElement> get visibleLibraries {
     Set<LibraryElement> visibleLibraries = new Set();
     _addVisibleLibraries(visibleLibraries, false);
     return new List.from(visibleLibraries);
   }
 
   @override
   bool operator ==(Object object) =>
-      object != null &&
-          runtimeType == object.runtimeType &&
-          _definingCompilationUnit ==
-              (object as LibraryElementImpl).definingCompilationUnit;
+      object is LibraryElementImpl &&
+          _definingCompilationUnit == object.definingCompilationUnit;
 
   @override
   accept(ElementVisitor visitor) => visitor.visitLibraryElement(this);
 
   @override
   ElementImpl getChild(String identifier) {
     if ((_definingCompilationUnit as CompilationUnitElementImpl).identifier ==
         identifier) {
       return _definingCompilationUnit as CompilationUnitElementImpl;
     }
@@ skipping 3549 matching lines @@
     // bottom <: void (as bottom is a subtype of all types).
     // void <: dynamic (as dynamic is a supertype of all types)
     return identical(type, this) || type.isDynamic;
   }
 
   @override
   VoidTypeImpl substitute2(List<DartType> argumentTypes,
       List<DartType> parameterTypes) =>
       this;
 }