Remove webkit prefix and annotate with experimental tag.

tools/dom/scripts/htmlrenamer.py

Index: tools/dom/scripts/htmlrenamer.py
diff --git a/tools/dom/scripts/htmlrenamer.py b/tools/dom/scripts/htmlrenamer.py
index 69b90af774eeba75c651ee50d2b8362c2c2fc0c1..6ca773a03ab2a626f5475866fc5a1f32c0a7b0ff 100644
--- a/tools/dom/scripts/htmlrenamer.py
+++ b/tools/dom/scripts/htmlrenamer.py
@@ -181,6 +181,8 @@ _private_html_members = monitored.Set('htmlrenamer._private_html_members', [
 # Members from the standard dom that exist in the dart:html library with
 # identical functionality but with cleaner names.
 _renamed_html_members = monitored.Dict('htmlrenamer._renamed_html_members', {
+    'Document.createCDATASection': 'createCDataSection',
+    'Document.defaultView': 'window',
     'DOMURL.createObjectURL': 'createObjectUrl',
     'DOMURL.revokeObjectURL': 'revokeObjectUrl',
     'DOMWindow.webkitConvertPointFromNodeToPage': 'convertPointFromNodeToPage',
@@ -190,8 +192,6 @@ _renamed_html_members = monitored.Dict('htmlrenamer._renamed_html_members', {
     'DOMWindow.webkitResolveLocalFileSystemURL': 'resolveLocalFileSystemUrl',
     'DOMWindow.webkitRequestFileSystem': 'requestFileSystem',
     'DOMWindow.webkitResolveLocalFileSystemURL': 'resolveLocalFileSystemUrl',
-    'Document.createCDATASection': 'createCDataSection',
-    'Document.defaultView': 'window',
     'Element.scrollIntoViewIfNeeded': 'scrollIntoView',
     'Element.webkitCreateShadowRoot': 'createShadowRoot',
     'Element.webkitMatchesSelector' : 'matches',
@@ -211,6 +211,10 @@ _renamed_html_members = monitored.Dict('htmlrenamer._renamed_html_members', {
         'resolveLocalFileSystemUrl',
 })
 
+# Autopopulated by members that start with webkit that were not explicitly
+# listed.
+webkit_member_prefix_renames = set()
+
 # Members and classes from the dom that should be removed completely from
 # dart:html.  These could be expressed in the IDL instead but expressing this
 # as a simple table instead is more concise.
@@ -516,6 +520,11 @@ class HtmlRenamer(object):
       if not target_name.startswith('$dom_'):  # e.g. $dom_svgClassName
         target_name = '$dom_' + target_name
 
+    if not name and target_name.startswith('webkit'):
+      webkit_member_prefix_renames.add('%s.%s' % (interface.id, member))
+      target_name = member[len('webkit'):]
+      target_name = target_name[:1].lower() + target_name[1:]
+
     if dartify_name:
       target_name = self._DartifyMemberName(target_name)
     return target_name