Revert "Generate some of the C++ bindings for mojom tagged unions."

mojo/public/tools/bindings/pylib/mojom/generate/module.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This module's classes provide an interface to mojo modules. Modules are
 # collections of interfaces and structs to be used by mojo ipc clients and
 # servers.
 #
 # A simple interface would be created this way:
 # module = mojom.generate.module.Module('Foo')
@@ skipping 404 matching lines @@
 
 def IsSharedBufferKind(kind):
   return (kind.spec == SHAREDBUFFER.spec or
           kind.spec == NULLABLE_SHAREDBUFFER.spec)
 
 
 def IsStructKind(kind):
   return isinstance(kind, Struct)
 
 
-def IsUnionKind(kind):
-  return isinstance(kind, Union)
-
-
 def IsArrayKind(kind):
   return isinstance(kind, Array)
 
 
 def IsInterfaceKind(kind):
   return isinstance(kind, Interface)
 
 
 def IsInterfaceRequestKind(kind):
   return isinstance(kind, InterfaceRequest)
@@ skipping 10 matching lines @@
 def IsNullableKind(kind):
   return IsReferenceKind(kind) and kind.is_nullable
 
 
 def IsMapKind(kind):
   return isinstance(kind, Map)
 
 
 def IsObjectKind(kind):
   return (IsStructKind(kind) or IsArrayKind(kind) or IsStringKind(kind) or
-          IsMapKind(kind) or IsUnionKind(kind))
+          IsMapKind(kind))
 
 
 def IsNonInterfaceHandleKind(kind):
   return (IsHandleKind(kind) or
           IsDataPipeConsumerKind(kind) or
           IsDataPipeProducerKind(kind) or
           IsMessagePipeKind(kind) or
           IsSharedBufferKind(kind))
 
 
@@ skipping 10 matching lines @@
 def IsCloneableKind(kind):
   def ContainsHandles(kind, visited_kinds):
     if kind in visited_kinds:
       # No need to examine the kind again.
       return False
     visited_kinds.add(kind)
     if IsAnyHandleKind(kind):
       return True
     if IsArrayKind(kind):
       return ContainsHandles(kind.kind, visited_kinds)
-    if IsStructKind(kind) or IsUnionKind(kind):
+    if IsStructKind(kind):
       for field in kind.fields:
         if ContainsHandles(field.kind, visited_kinds):
           return True
     return False
 
   return not ContainsHandles(kind, set())
 
 
 def HasCallbacks(interface):
   for method in interface.methods:
     if method.response_parameters != None:
       return True
   return False