Add dummy dart:html library for documentation.

lib/html/doc/interface/SVGColor.dartdoc

Index: lib/html/doc/interface/SVGColor.dartdoc
diff --git a/lib/html/doc/interface/SVGColor.dartdoc b/lib/html/doc/interface/SVGColor.dartdoc
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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.
+
+// WARNING:
+//   This file contains documentation that is merged into the real source.
+//   Do not make code changes here.
+
+/// @domName SVGColor
+interface SVGColor extends CSSValue {
+
+  static final int SVG_COLORTYPE_CURRENTCOLOR = 3;
+
+  static final int SVG_COLORTYPE_RGBCOLOR = 1;
+
+  static final int SVG_COLORTYPE_RGBCOLOR_ICCCOLOR = 2;
+
+  static final int SVG_COLORTYPE_UNKNOWN = 0;
+
+  /** @domName SVGColor.colorType */
+  final int colorType;
+
+  /** @domName SVGColor.rgbColor */
+  final RGBColor rgbColor;
+
+  /** @domName SVGColor.setColor */
+  void setColor(int colorType, String rgbColor, String iccColor);
+
+  /** @domName SVGColor.setRGBColor */
+  void setRGBColor(String rgbColor);
+
+  /** @domName SVGColor.setRGBColorICCColor */
+  void setRGBColorICCColor(String rgbColor, String iccColor);
+}