Add dummy dart:html library for documentation.

lib/html/doc/interface/SVGFEDiffuseLightingElement.dartdoc

Index: lib/html/doc/interface/SVGFEDiffuseLightingElement.dartdoc
diff --git a/lib/html/doc/interface/SVGFEDiffuseLightingElement.dartdoc b/lib/html/doc/interface/SVGFEDiffuseLightingElement.dartdoc
new file mode 100644
index 0000000000000000000000000000000000000000..be77408d9dc70819562acb2795aefe13300dc556
--- /dev/null
+++ b/lib/html/doc/interface/SVGFEDiffuseLightingElement.dartdoc
@@ -0,0 +1,26 @@
+// 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.
+
+// WARNING:
+//   This file contains documentation that is merged into the real source.
+//   Do not make code changes here.
+
+/// @domName SVGFEDiffuseLightingElement
+interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+
+  /** @domName SVGFEDiffuseLightingElement.diffuseConstant */
+  final SVGAnimatedNumber diffuseConstant;
+
+  /** @domName SVGFEDiffuseLightingElement.in1 */
+  final SVGAnimatedString in1;
+
+  /** @domName SVGFEDiffuseLightingElement.kernelUnitLengthX */
+  final SVGAnimatedNumber kernelUnitLengthX;
+
+  /** @domName SVGFEDiffuseLightingElement.kernelUnitLengthY */
+  final SVGAnimatedNumber kernelUnitLengthY;
+
+  /** @domName SVGFEDiffuseLightingElement.surfaceScale */
+  final SVGAnimatedNumber surfaceScale;
+}