[WIP][NotForLand] IDL dictionary support

Source/bindings/scripts/idl_types.py

Index: Source/bindings/scripts/idl_types.py
diff --git a/Source/bindings/scripts/idl_types.py b/Source/bindings/scripts/idl_types.py
index 00c3e7edd5682c5ff1dbdf191af1fbec4d4bdac3..098a65e5a50bb91b4370a2f492bf0d688569b408 100644
--- a/Source/bindings/scripts/idl_types.py
+++ b/Source/bindings/scripts/idl_types.py
@@ -105,6 +105,7 @@ class IdlType(object):
     # as orthogonal properties (via flags).
     callback_functions = set()
     callback_interfaces = set()
+    dictionaries = set()
     enums = {}  # name -> values
 
     def __init__(self, base_type, is_array=False, is_sequence=False, is_nullable=False, is_unrestricted=False):
@@ -159,6 +160,10 @@ class IdlType(object):
         return self.base_type in IdlType.callback_interfaces
 
     @property
+    def is_dictionary(self):
+        return self.base_type in IdlType.dictionaries
+
+    @property
     def is_composite_type(self):
         return (self.name == 'Any' or
                 self.array_element_type or
@@ -196,6 +201,7 @@ class IdlType(object):
         return not(self.is_basic_type or
                    self.is_composite_type or
                    self.is_callback_function or
+                   self.is_dictionary or
                    self.is_enum or
                    self.name == 'Object' or
                    self.name == 'Promise')  # Promise will be basic in future
@@ -242,6 +248,10 @@ class IdlType(object):
         cls.callback_interfaces.update(new_callback_interfaces)
 
     @classmethod
+    def set_dictionaries(cls, new_dictionaries):
+        cls.dictionaries.update(new_dictionaries)
+
+    @classmethod
     def set_enums(cls, new_enums):
         cls.enums.update(new_enums)
 
@@ -305,6 +315,10 @@ class IdlUnionType(object):
         return False
 
     @property
+    def is_dictionary(self):
+        return False
+
+    @property
     def is_enum(self):
         return False