Begin moving code generation tools from analysis_server to analyzer.

pkg/analyzer/lib/src/codegen/html.dart

Index: pkg/analyzer/lib/src/codegen/html.dart
diff --git a/pkg/analysis_server/tool/spec/html_tools.dart b/pkg/analyzer/lib/src/codegen/html.dart
similarity index 96%
copy from pkg/analysis_server/tool/spec/html_tools.dart
copy to pkg/analyzer/lib/src/codegen/html.dart
index d46419feb88b0324f9bf9dcacd62e69a9d83dceb..4307c5c13d4be68ac7de9fd00fac054a86a2767e 100644
--- a/pkg/analysis_server/tool/spec/html_tools.dart
+++ b/pkg/analyzer/lib/src/codegen/html.dart
@@ -3,9 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /**
- * Tools for HTML manipulation.
+ * Tools for manipulating HTML during code generation of analyzer and analysis
+ * server.
  */
-library html.tools;
+library analyzer.src.codegen.html;
 
 import 'package:html/dom.dart' as dom;