Dynamic -> dynamic.

runtime/lib/byte_array.dart

Index: runtime/lib/byte_array.dart
diff --git a/runtime/lib/byte_array.dart b/runtime/lib/byte_array.dart
index fff47bda1d14d552e004d5cbfe73f6334c16bfe5..0f97c3d20814c70f92ab99fbeb85e85707ee37ae 100644
--- a/runtime/lib/byte_array.dart
+++ b/runtime/lib/byte_array.dart
@@ -136,8 +136,8 @@ abstract class _ByteArrayBase {
     return Collections.map(this, new List(), f);
   }
 
-  Dynamic reduce(Dynamic initialValue,
-                 Dynamic combine(Dynamic initialValue, element)) {
+  dynamic reduce(dynamic initialValue,
+                 dynamic combine(dynamic initialValue, element)) {
     return Collections.reduce(this, initialValue, combine);
   }
 
@@ -1616,8 +1616,8 @@ class _ByteArrayViewBase {
     return Collections.map(this, new List(), f);
   }
 
-  Dynamic reduce(Dynamic initialValue,
-                 Dynamic combine(Dynamic initialValue, element)) {
+  dynamic reduce(dynamic initialValue,
+                 dynamic combine(dynamic initialValue, element)) {
     return Collections.reduce(this, initialValue, combine);
   }