Add constructors for Float32Array and friends.

client/html/src/Int16Array.dart

Index: client/html/src/Int16Array.dart
diff --git a/client/html/generated/src/interface/Int16Array.dart b/client/html/src/Int16Array.dart
similarity index 62%
rename from client/html/generated/src/interface/Int16Array.dart
rename to client/html/src/Int16Array.dart
index ed01fd5d06bbffcf0de4cca98c1803f09735ef9e..33b9510030c8eb2570cf0b5a85bc1fb9ee8741ce 100644
--- a/client/html/generated/src/interface/Int16Array.dart
+++ b/client/html/src/Int16Array.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 Int16Array extends ArrayBufferView {
+interface Int16Array extends ArrayBufferView
+    default Int16ArrayWrappingImplementation {
 
   static final int BYTES_PER_ELEMENT = 2;
 
+  Int16Array(int length);
+
+  Int16Array.from(List<num> list);
+
+  Int16Array.fromBuffer(ArrayBuffer buffer);
+
   int get length();
 
   Int16Array subarray(int start, [int end]);