Extract interfaces and members renaming logic to a new HtmlRenamer class.

lib/dom/scripts/generator.py

Index: lib/dom/scripts/generator.py
diff --git a/lib/dom/scripts/generator.py b/lib/dom/scripts/generator.py
index fd758185139ed8fbe841a7de2fa20d655acbcc25..cba4b15008d6d677a9ba325cf344d19a2922f314 100644
--- a/lib/dom/scripts/generator.py
+++ b/lib/dom/scripts/generator.py
@@ -815,8 +815,9 @@ _svg_supplemental_includes = [
 ]
 
 class TypeRegistry(object):
-  def __init__(self, interface_renames):
-    self._interface_renames = interface_renames
+  def __init__(self, database, renamer=None):
+    self._database = database
+    self._renamer = renamer
     self._cache = {}
 
   def TypeInfo(self, type_name):
@@ -826,10 +827,10 @@ class TypeRegistry(object):
 
   def DartType(self, type_name):
     dart_type = self.TypeInfo(type_name).dart_type()
-    return self._interface_renames.get(dart_type, dart_type)
-
-  def InterfaceName(self, type_name):
-    return self._interface_renames.get(type_name, type_name)
+    if self._database.HasInterface(dart_type):
+      interface = self._database.GetInterface(dart_type)
+      return self._renamer.RenameInterface(interface)
+    return dart_type
 
   def _TypeInfo(self, type_name):
     match = re.match(r'(?:sequence<(\w+)>|(\w+)\[\])$', type_name)