Reapply "Rename mappedBy to map."

sdk/lib/_internal/compiler/implementation/js/nodes.dart

Index: sdk/lib/_internal/compiler/implementation/js/nodes.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js/nodes.dart b/sdk/lib/_internal/compiler/implementation/js/nodes.dart
index 8a4960a6faba19505f37b987397fc26112f91224..148547e5076023b6ae6f05611a77d55b6c895b78 100644
--- a/sdk/lib/_internal/compiler/implementation/js/nodes.dart
+++ b/sdk/lib/_internal/compiler/implementation/js/nodes.dart
@@ -791,7 +791,7 @@ class ArrayInitializer extends Expression {
 
   static List<ArrayElement> _convert(List<Expression> expressions) {
     int index = 0;
-    return expressions.mappedBy(
+    return expressions.map(
         (expression) => new ArrayElement(index++, expression))
         .toList();
   }
@@ -896,8 +896,7 @@ Call call(Expression target, List<Expression> arguments) {
 }
 
 Fun fun(List<String> parameterNames, Block body) {
-  return new Fun(parameterNames.mappedBy((n) => new Parameter(n)).toList(),
-                 body);
+  return new Fun(parameterNames.map((n) => new Parameter(n)).toList(), body);
 }
 
 Assignment assign(Expression leftHandSide, Expression value) {