Add constructors for Float32Array and friends.

client/html/src/Float32Array.dart

Index: client/html/src/Float32Array.dart
diff --git a/client/html/generated/src/interface/Float32Array.dart b/client/html/src/Float32Array.dart
similarity index 61%
rename from client/html/generated/src/interface/Float32Array.dart
rename to client/html/src/Float32Array.dart
index 67d93b69208b24c68ebd4c86f63c05a80f7c45f8..4b3b19505e5abe7b095fa9ba6035f7264e938a7d 100644
--- a/client/html/generated/src/interface/Float32Array.dart
+++ b/client/html/src/Float32Array.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 Float32Array extends ArrayBufferView {
+interface Float32Array extends ArrayBufferView
+    default Float32ArrayWrappingImplementation {
 
   static final int BYTES_PER_ELEMENT = 4;
 
+  Float32Array(int length);
+
+  Float32Array.from(List<num> list);
+
+  Float32Array.fromBuffer(ArrayBuffer buffer);
+
   int get length();
 
   Float32Array subarray(int start, [int end]);