Add dummy dart:html library for documentation.

lib/html/doc/nodoc-src/_TypedArrayFactoryProvider.dart

Index: lib/html/doc/nodoc-src/_TypedArrayFactoryProvider.dart
diff --git a/lib/html/doc/nodoc-src/_TypedArrayFactoryProvider.dart b/lib/html/doc/nodoc-src/_TypedArrayFactoryProvider.dart
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+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
+
+class _TypedArrayFactoryProvider {
+
+  factory Float32Array(int length) => null;
+  factory Float32Array.fromList(List<num> list) => null;
+  factory Float32Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Float64Array(int length) => null;
+  factory Float64Array.fromList(List<num> list) => null;
+  factory Float64Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Int8Array(int length) => null;
+  factory Int8Array.fromList(List<num> list) => null;
+  factory Int8Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Int16Array(int length) => null;
+  factory Int16Array.fromList(List<num> list) => null;
+  factory Int16Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Int32Array(int length) => null;
+  factory Int32Array.fromList(List<num> list) => null;
+  factory Int32Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Uint8Array(int length) => null;
+  factory Uint8Array.fromList(List<num> list) => null;
+  factory Uint8Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Uint16Array(int length) => null;
+  factory Uint16Array.fromList(List<num> list) => null;
+  factory Uint16Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Uint32Array(int length) => null;
+  factory Uint32Array.fromList(List<num> list) => null;
+  factory Uint32Array.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+
+  factory Uint8ClampedArray(int length) => null;
+  factory Uint8ClampedArray.fromList(List<num> list) => null;
+  factory Uint8ClampedArray.fromBuffer(
+      ArrayBuffer buffer, [int byteOffset = 0, int length]) => null;
+}