Fix for conditional expressions

test/codegen/expect/dart/core.js

 var core;
 (function(exports) {
   'use strict';
   // Function _symbolToString: (Symbol) → String
   function _symbolToString(symbol) {
     return _internal.Symbol.getName(dart.as(symbol, _internal.Symbol));
   }
   // Function _symbolMapToStringMap: (Map<Symbol, dynamic>) → dynamic
   function _symbolMapToStringMap(map) {
     if (map === null)
@@ skipping 243 matching lines @@
     subtract(duration) {
       let ms = this.millisecondsSinceEpoch;
       return new DateTime.fromMillisecondsSinceEpoch(dart.notNull(ms) - dart.notNull(duration.inMilliseconds), {isUtc: this.isUtc});
     }
     difference(other) {
       let ms = this.millisecondsSinceEpoch;
       let otherMs = other.millisecondsSinceEpoch;
       return new Duration({milliseconds: dart.notNull(ms) - dart.notNull(otherMs)});
     }
     DateTime$_internal(year, month, day, hour, minute, second, millisecond, isUtc) {
-      this.isUtc = dart.as(typeof isUtc == boolean ? isUtc : dart.throw_(new ArgumentError(isUtc)), bool);
+      this.isUtc = typeof isUtc == boolean ? isUtc : dart.throw_(new ArgumentError(isUtc));
       this.millisecondsSinceEpoch = dart.as(_js_helper.checkInt(_js_helper.Primitives.valueFromDecomposedDate(year, month, day, hour, minute, second, millisecond, isUtc)), int);
     }
     DateTime$_now() {
       this.isUtc = false;
       this.millisecondsSinceEpoch = _js_helper.Primitives.dateNow();
     }
     static [_brokenDownDateToMillisecondsSinceEpoch](year, month, day, hour, minute, second, millisecond, isUtc) {
       return dart.as(_js_helper.Primitives.valueFromDecomposedDate(year, month, day, hour, minute, second, millisecond, isUtc), int);
     }
     get timeZoneName() {
@@ skipping 696 matching lines @@
     Expando._EXPANDO_PROPERTY_NAME = 'expando$values';
     Expando._keyCount = 0;
     return Expando;
   });
   let Expando = Expando$(dynamic);
   let _toMangledNames = Symbol('_toMangledNames');
   class Function extends dart.Object {
     static apply(function, positionalArguments, namedArguments) {
       if (namedArguments === void 0)
         namedArguments = null;
-      return _js_helper.Primitives.applyFunction(function, positionalArguments, dart.as(namedArguments === null ? null : _toMangledNames(namedArguments), Map$(String, dynamic)));
+      return _js_helper.Primitives.applyFunction(function, positionalArguments, namedArguments === null ? null : _toMangledNames(namedArguments));
     }
     static [_toMangledNames](namedArguments) {
       let result = dart.as(dart.map(), Map$(String, dynamic));
       namedArguments.forEach((symbol, value) => {
         result.set(_symbolToString(dart.as(symbol, Symbol)), value);
       });
       return result;
     }
   }
   // Function identical: (Object, Object) → bool
@@ skipping 498 matching lines @@
       this[_currentCodePoint] = null;
       RangeError.checkValueInInterval(index, 0, string.length);
       this[_checkSplitSurrogate](index);
     }
     [_checkSplitSurrogate](index) {
       if (dart.notNull(index) > 0 && dart.notNull(index) < dart.notNull(this.string.length) && dart.notNull(_isLeadSurrogate(this.string.codeUnitAt(dart.notNull(index) - 1))) && dart.notNull(_isTrailSurrogate(this.string.codeUnitAt(index)))) {
         throw new ArgumentError(`Index inside surrogate pair: ${index}`);
       }
     }
     get rawIndex() {
-      return dart.as(this[_position] !== this[_nextPosition] ? this[_position] : null, int);
+      return this[_position] !== this[_nextPosition] ? this[_position] : null;
     }
     set rawIndex(rawIndex) {
       RangeError.checkValidIndex(rawIndex, this.string, "rawIndex");
       this.reset(rawIndex);
       this.moveNext();
     }
     reset(rawIndex) {
       if (rawIndex === void 0)
         rawIndex = 0;
       RangeError.checkValueInInterval(rawIndex, 0, this.string.length, "rawIndex");
@@ skipping 1010 matching lines @@
       let targetUserInfo = "";
       let targetHost = null;
       let targetPort = null;
       let targetPath = null;
       let targetQuery = null;
       if (reference.scheme.isNotEmpty) {
         targetScheme = reference.scheme;
         if (reference.hasAuthority) {
           targetUserInfo = reference.userInfo;
           targetHost = reference.host;
-          targetPort = dart.as(reference.hasPort ? reference.port : null, int);
+          targetPort = reference.hasPort ? reference.port : null;
         }
         targetPath = this[_removeDotSegments](reference.path);
         if (reference.hasQuery) {
           targetQuery = reference.query;
         }
       } else {
         targetScheme = this.scheme;
         if (reference.hasAuthority) {
           targetUserInfo = reference.userInfo;
           targetHost = reference.host;
-          targetPort = _makePort(dart.as(reference.hasPort ? reference.port : null, int), targetScheme);
+          targetPort = _makePort(reference.hasPort ? reference.port : null, targetScheme);
           targetPath = this[_removeDotSegments](reference.path);
           if (reference.hasQuery)
             targetQuery = reference.query;
         } else {
           if (dart.equals(reference.path, "")) {
             targetPath = this[_path];
             if (reference.hasQuery) {
               targetQuery = reference.query;
             } else {
               targetQuery = this[_query];
             }
           } else {
             if (reference.path.startsWith("/")) {
               targetPath = this[_removeDotSegments](reference.path);
             } else {
               targetPath = this[_removeDotSegments](this[_merge](this[_path], reference.path));
             }
             if (reference.hasQuery)
               targetQuery = reference.query;
           }
           targetUserInfo = this[_userInfo];
           targetHost = this[_host];
           targetPort = this[_port];
         }
       }
-      let fragment = dart.as(reference.hasFragment ? reference.fragment : null, String);
+      let fragment = reference.hasFragment ? reference.fragment : null;
       return new Uri._internal(targetScheme, targetUserInfo, targetHost, targetPort, targetPath, targetQuery, fragment);
     }
     get hasAuthority() {
       return this[_host] !== null;
     }
     get hasPort() {
       return this[_port] !== null;
     }
     get hasQuery() {
       return this[_query] !== null;
@@ skipping 452 matching lines @@
   exports.Stopwatch = Stopwatch;
   exports.String = String;
   exports.Runes = Runes;
   exports.RuneIterator = RuneIterator;
   exports.StringBuffer = StringBuffer;
   exports.StringSink = StringSink;
   exports.Symbol = Symbol;
   exports.Type = Type;
   exports.Uri = Uri;
 })(core || (core = {}));