Add constructors for Float32Array and friends.

client/html/src/Uint16Array.dart

Index: client/html/src/Uint16Array.dart
diff --git a/client/html/generated/src/interface/Uint16Array.dart b/client/html/src/Uint16Array.dart
similarity index 61%
rename from client/html/generated/src/interface/Uint16Array.dart
rename to client/html/src/Uint16Array.dart
index eb4be31174ea3d002daa2817268af6964ed47174..b00ac4ebe8d9f5e6685fe41fe52f325f0928db57 100644
--- a/client/html/generated/src/interface/Uint16Array.dart
+++ b/client/html/src/Uint16Array.dart
@@ -2,12 +2,17 @@
 // 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.
 
-// WARNING: Do not edit - generated code.
-
-interface Uint16Array extends ArrayBufferView {
+interface Uint16Array extends ArrayBufferView
+    default Uint16ArrayWrappingImplementation {
 
   static final int BYTES_PER_ELEMENT = 2;
 
+  Uint16Array(int length);
+
+  Uint16Array.from(List<num> list);
+
+  Uint16Array.fromBuffer(ArrayBuffer buffer);
+
   int get length();
 
   Uint16Array subarray(int start, [int end]);