Revert "Fixing the BeforeUnloadEvent"

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 125dbc845d8df109ed9ce1373bb4175fb1dd27de..0db0feea3acf0167a71bc3c5c74fc561e536f187 100644
--- a/tools/dom/scripts/htmlrenamer.py
+++ b/tools/dom/scripts/htmlrenamer.py
@@ -474,8 +474,6 @@ for member in convert_to_future_members:
 # Syntax is: ClassName.(get\:|set\:|call\:|on\:)?MemberName
 # Using get: and set: is optional and should only be used when a getter needs
 # to be suppressed but not the setter, etc.
-# Prepending ClassName with = will only match against direct class, not for
-# subclasses.
 # TODO(jacobr): cleanup and augment this list.
 removed_html_members = monitored.Set('htmlrenamer.removed_html_members', [
     'AudioBufferSourceNode.looping', # TODO(vsm): Use deprecated IDL annotation
@@ -596,7 +594,7 @@ removed_html_members = monitored.Set('htmlrenamer.removed_html_members', [
     'Element.webkitCreateShadowRoot',
     'Element.webkitPseudo',
     'Element.webkitShadowRoot',
-    '=Event.returnValue', # Only suppress on Event, allow for BeforeUnloadEvnt.
+    'Event.returnValue',
     'Event.srcElement',
     'EventSource.URL',
     'FontFaceSet.load',
@@ -847,27 +845,17 @@ class HtmlRenamer(object):
       return True
 
   def _FindMatch(self, interface, member, member_prefix, candidates):
-    def find_match(interface_id):
-      member_name = interface_id + '.' + member
+    for interface in self._database.Hierarchy(interface):
+      member_name = interface.id + '.' + member
       if member_name in candidates:
         return member_name
-      member_name = interface_id + '.' + member_prefix + member
+      member_name = interface.id + '.' + member_prefix + member
       if member_name in candidates:
         return member_name
-      member_name = interface_id + '.*'
+      member_name = interface.id + '.*'
       if member_name in candidates:
         return member_name
 
-    # Check direct matches first
-    match = find_match('=%s' % interface.id)
-    if match:
-      return match
-
-    for interface in self._database.Hierarchy(interface):
-      match = find_match(interface.id)
-      if match:
-        return match
-
   def GetLibraryName(self, interface):
     # Some types have attributes merged in from many other interfaces.
     if interface.id in _library_names: