bindings: Add support for the record<K,V> WebIDL type.

third_party/WebKit/Source/bindings/scripts/v8_union.py

 # Copyright 2014 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.
 
 import v8_types
 import v8_utilities
 
 
 UNION_CPP_INCLUDES = frozenset([
     'bindings/core/v8/ToV8.h',
@@ skipping 34 matching lines @@
     # These variables refer to member contexts if the given union type has
     # corresponding types. They are used for V8 -> impl conversion.
     array_buffer_type = None
     array_buffer_view_type = None
     array_or_sequence_type = None
     boolean_type = None
     dictionary_type = None
     interface_types = []
     numeric_type = None
     object_type = None
+    record_type = None
     string_type = None
     for member in union_type.member_types:
         context = member_context(member, interfaces_info)
         members.append(context)
         if member.base_type == 'ArrayBuffer':
             if array_buffer_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             array_buffer_type = context
         elif member.base_type == 'ArrayBufferView':
             if array_buffer_view_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             array_buffer_view_type = context
         elif member.is_dictionary:
             if dictionary_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             dictionary_type = context
         elif member.is_array_or_sequence_type:
             if array_or_sequence_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             array_or_sequence_type = context
         # "Dictionary" is an object, rather than an IDL dictionary.
         elif member.base_type == 'Dictionary':
-            if object_type:
+            if object_type or record_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             object_type = context
+        elif member.is_record_type:
+            if object_type or record_type:
+                raise Exception('%s is ambiguous.' % union_type.name)
+            record_type = context
         elif member.is_interface_type:
             interface_types.append(context)
         elif member is union_type.boolean_member_type:
             boolean_type = context
         elif member is union_type.numeric_member_type:
             numeric_type = context
         elif member is union_type.string_member_type:
             string_type = context
         else:
             raise Exception('%s is not supported as an union member.' % member.name)
@@ skipping 14 matching lines @@
         'cpp_class': cpp_class,
         'cpp_includes': sorted(cpp_includes - UNION_CPP_INCLUDES_BLACKLIST),
         'dictionary_type': dictionary_type,
         'header_includes': sorted(header_includes),
         'header_forward_decls': sorted(header_forward_decls),
         'includes_nullable_type': union_type.includes_nullable_type,
         'interface_types': interface_types,
         'members': members,
         'numeric_type': numeric_type,
         'object_type': object_type,
+        'record_type': record_type,
         'string_type': string_type,
         'type_string': str(union_type),
         'v8_class': v8_types.v8_type(cpp_class),
     }
 
 
 def _update_includes_and_forward_decls(member, interface_info):
     if interface_info:
         cpp_includes.update(interface_info.get(
             'dependencies_include_paths', []))
         # We need complete types for IDL dictionaries in union containers.
         if member.is_dictionary or member.is_typed_array:
             header_includes.update(member.includes_for_type())
         else:
             cpp_includes.update(member.includes_for_type())
             header_forward_decls.add(member.implemented_as)
     else:
-        cpp_includes.update(member.includes_for_type())
+        if member.is_record_type:
+            # The headers for both T and U must be present when
+            # Vector<std::pair<T, U>> is declared.
+            header_includes.update(member.includes_for_type())
+        else:
+            cpp_includes.update(member.includes_for_type())
 
 
 def member_context(member, interfaces_info):
     interface_info = interfaces_info.get(member.name, None)
     _update_includes_and_forward_decls(member, interface_info)
     if member.is_nullable:
         member = member.inner_type
     return {
         'cpp_name': v8_utilities.uncapitalize(member.name),
         'cpp_type': member.cpp_type_args(used_in_cpp_sequence=True),
         'cpp_local_type': member.cpp_type,
         'cpp_value_to_v8_value': member.cpp_value_to_v8_value(
             cpp_value='impl.getAs%s()' % member.name, isolate='isolate',
             creation_context='creationContext'),
         'enum_values': member.enum_values,
         'is_array_buffer_or_view_type': member.is_array_buffer_or_view,
         'is_traceable': member.is_traceable,
         'rvalue_cpp_type': member.cpp_type_args(used_as_rvalue_type=True),
         'specific_type_enum': 'SpecificType' + member.name,
         'type_name': member.name,
         'v8_value_to_local_cpp_value': member.v8_value_to_local_cpp_value(
             {}, 'v8Value', 'cppValue', isolate='isolate',
             use_exception_state=True)
     }