bindings: Support sequence in callback function arguments

third_party/WebKit/Source/bindings/scripts/v8_callback_function.py

Index: third_party/WebKit/Source/bindings/scripts/v8_callback_function.py
diff --git a/third_party/WebKit/Source/bindings/scripts/v8_callback_function.py b/third_party/WebKit/Source/bindings/scripts/v8_callback_function.py
index 4900abac48256e8271b05a03698b66df6eac8176..d95a952e454839857c727565faf094d461396080 100644
--- a/third_party/WebKit/Source/bindings/scripts/v8_callback_function.py
+++ b/third_party/WebKit/Source/bindings/scripts/v8_callback_function.py
@@ -16,7 +16,9 @@ CALLBACK_FUNCTION_H_INCLUDES = frozenset([
     'wtf/text/WTFString.h',
 ])
 CALLBACK_FUNCTION_CPP_INCLUDES = frozenset([
+    'bindings/core/v8/ExceptionState.h',
     'bindings/core/v8/ScriptState.h',
+    'bindings/core/v8/ToV8.h',
     'bindings/core/v8/V8Binding.h',
     'wtf/Assertions.h',
 ])
@@ -27,18 +29,25 @@ def callback_function_context(callback_function):
     includes.update(CALLBACK_FUNCTION_CPP_INCLUDES)
     idl_type = callback_function.idl_type
     idl_type_str = str(idl_type)
+
     context = {
         'cpp_class': callback_function.name,
         'cpp_includes': sorted(CALLBACK_FUNCTION_CPP_INCLUDES),
         'header_includes': sorted(CALLBACK_FUNCTION_H_INCLUDES),
         'idl_type': idl_type_str,
-        'return_cpp_type': (idl_type.cpp_type + '&') if idl_type.cpp_type != 'void' else None,
-        'return_value': idl_type.v8_value_to_local_cpp_value(
-            callback_function.extended_attributes, 'v8ReturnValue', 'cppValue',
-            bailout_return_value="false") if idl_type.cpp_type != 'void' else None,
         'v8_class': v8_utilities.v8_class_name(callback_function),
     }
-    context.update(arguments_context(callback_function.arguments, context['return_cpp_type']))
+
+    if idl_type_str != 'void':
+        context.update({
+            'return_cpp_type': idl_type.cpp_type + '&',
+            'return_value': idl_type.v8_value_to_local_cpp_value(
+                callback_function.extended_attributes,
+                'v8ReturnValue', 'cppValue',
+                isolate='scriptState->isolate()', bailout_return_value='false'),
+        })
+
+    context.update(arguments_context(callback_function.arguments, context.get('return_cpp_type')))
     return context