Bindings: inherit enums and callbacks from partial interface files.

Source/bindings/scripts/idl_definitions.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 130 matching lines @@
         # Resolve typedefs with the actual types and then discard the Typedefs.
         # http://www.w3.org/TR/WebIDL/#idl-typedefs
         self.resolve_typedefs(typedefs)
 
     def resolve_typedefs(self, typedefs):
         for callback_function in self.callback_functions.itervalues():
             callback_function.resolve_typedefs(typedefs)
         for interface in self.interfaces.itervalues():
             interface.resolve_typedefs(typedefs)
 
+    def merge(self, other):

[Nils Barth (inactive), 2014/03/20 01:01:46]

This is a useful method!
Could you:
1. Move the attribute, constant, and operation appending to this method?
This requires just having a conditional:
* if interface doesn't exist, add it;
* if it does exist, append members (by calling merge() on IdlInterface)

2. Add a docstring, like:
"""Merge in another set of IdlDefinitions (e.g., partial interface)."""

[Nils Barth (inactive), 2014/03/20 02:11:11]

This method is a great idea, so I've implemented it in a separate CL
(calling it update()):
Refactor interface dependency resolution
https://codereview.chromium.org/205873003/

Once that lands, you'll just need to add these two lines to the method,
and then add your tests, and this CL will be good to go!

+        self.callback_functions.update(other.callback_functions)
+        self.enumerations.update(other.enumerations)
+
 
 ################################################################################
 # Callback Functions
 ################################################################################
 
 class IdlCallbackFunction(TypedObject):
     def __init__(self, node):
         children = node.GetChildren()
         num_children = len(children)
         if num_children != 2:
@@ skipping 459 matching lines @@
     child_class = child.GetClass()
     if child_class != 'Type':
         raise ValueError('Unrecognized node class: %s' % child_class)
     return type_node_to_type(child)
 
 
 def union_type_node_to_idl_union_type(node, is_nullable=False):
     member_types = [type_node_to_type(member_type_node)
                     for member_type_node in node.GetChildren()]
     return IdlUnionType(member_types, is_nullable=is_nullable)