[WIP][NotForLand] IDL dictionary support

Source/bindings/scripts/utilities.py

Index: Source/bindings/scripts/utilities.py
diff --git a/Source/bindings/scripts/utilities.py b/Source/bindings/scripts/utilities.py
index 0aeabc20b3610e6fbef41af25430e1b57cd958e5..74c318a9fbb28332bc572df7657e4debb2830901 100644
--- a/Source/bindings/scripts/utilities.py
+++ b/Source/bindings/scripts/utilities.py
@@ -49,6 +49,9 @@ def write_file(new_text, destination_filename, only_if_changed):
         with open(destination_filename) as destination_file:
             if destination_file.read() == new_text:
                 return
+    destination_dirname = os.path.dirname(destination_filename)
+    if not os.path.exists(destination_dirname):
+        os.makedirs(destination_dirname)
     with open(destination_filename, 'w') as destination_file:
         destination_file.write(new_text)
 
@@ -119,6 +122,11 @@ def is_callback_interface_from_idl(file_contents):
     return bool(match)
 
 
+def is_dictionary_from_idl(file_contents):
+    match = re.search(r'dictionary\s+\w+\s*{', file_contents)
+    return bool(match)
+
+
 def get_parent_interface(file_contents):
     match = re.search(r'interface\s+'
                       r'\w+\s*'