Add dummy dart:html library for documentation.

lib/html/doc/interface/ScriptProfileNode.dartdoc

Index: lib/html/doc/interface/ScriptProfileNode.dartdoc
diff --git a/lib/html/doc/interface/ScriptProfileNode.dartdoc b/lib/html/doc/interface/ScriptProfileNode.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 ScriptProfileNode
+interface ScriptProfileNode {
+
+  /** @domName ScriptProfileNode.callUID */
+  final int callUID;
+
+  /** @domName ScriptProfileNode.children */
+  final List<ScriptProfileNode> children;
+
+  /** @domName ScriptProfileNode.functionName */
+  final String functionName;
+
+  /** @domName ScriptProfileNode.lineNumber */
+  final int lineNumber;
+
+  /** @domName ScriptProfileNode.numberOfCalls */
+  final int numberOfCalls;
+
+  /** @domName ScriptProfileNode.selfTime */
+  final num selfTime;
+
+  /** @domName ScriptProfileNode.totalTime */
+  final num totalTime;
+
+  /** @domName ScriptProfileNode.url */
+  final String url;
+
+  /** @domName ScriptProfileNode.visible */
+  final bool visible;
+}