Add forEach() to CSSVariablesMap

Source/bindings/scripts/v8_callback_interface.py

Index: Source/bindings/scripts/v8_callback_interface.py
diff --git a/Source/bindings/scripts/v8_callback_interface.py b/Source/bindings/scripts/v8_callback_interface.py
index ceb7c99ed5a70e7f591fb6bd24a8a8a9edf623fc..55acbcbf0d9c50008f92cf779149a19435b68a3f 100644
--- a/Source/bindings/scripts/v8_callback_interface.py
+++ b/Source/bindings/scripts/v8_callback_interface.py
@@ -29,7 +29,7 @@
 """Generate template values for a callback interface."""
 
 from v8_types import cpp_type, cpp_value_to_v8_value, includes_for_type
-from v8_utilities import v8_class_name
+from v8_utilities import v8_class_name, has_extended_attribute_value
 
 CALLBACK_INTERFACE_H_INCLUDES = set([
     'bindings/v8/ActiveDOMCallback.h',
@@ -86,16 +86,18 @@ def includes_for_operation(operation):
 
 
 def generate_method_contents(operation):
+    call_with_this_handle = has_extended_attribute_value(operation.extended_attributes, 'CallWith', 'ThisValue')
     contents = {
         'name': operation.name,
         'return_cpp_type': cpp_type(operation.data_type, 'RefPtr'),
         'custom': 'Custom' in operation.extended_attributes,
+        'call_with_this_handle': call_with_this_handle,
     }
-    contents.update(generate_arguments_contents(operation.arguments))
+    contents.update(generate_arguments_contents(operation.arguments, call_with_this_handle))
     return contents
 
 
-def generate_arguments_contents(arguments):
+def generate_arguments_contents(arguments, call_with_this_handle):
     def argument_declaration(argument):
         return '%s %s' % (cpp_type(argument.data_type), argument.name)
 
@@ -105,8 +107,11 @@ def generate_arguments_contents(arguments):
             'cpp_to_v8_conversion': cpp_to_v8_conversion(argument.data_type, argument.name),
         }
 
+    argument_declarations = [argument_declaration(argument) for argument in arguments]
+    if call_with_this_handle:
+        argument_declarations.insert(0, 'ScriptValue thisValue')
     return  {
-        'argument_declarations': [argument_declaration(argument) for argument in arguments],
+        'argument_declarations': argument_declarations,
         'arguments': [generate_argument(argument) for argument in arguments],
         'handles': ['%sHandle' % argument.name for argument in arguments],
     }