Support per-overload [RuntimeEnabled] extended attribute

Source/bindings/scripts/v8_interface.py

Index: Source/bindings/scripts/v8_interface.py
diff --git a/Source/bindings/scripts/v8_interface.py b/Source/bindings/scripts/v8_interface.py
index fdefb37d21ec2589a1314edd5f6a4452be179fd1..4b0c3de603fc309970e98ce224bf41aeb563f252 100644
--- a/Source/bindings/scripts/v8_interface.py
+++ b/Source/bindings/scripts/v8_interface.py
@@ -251,11 +251,17 @@ def generate_interface(interface):
                if method.name]  # Skip anonymous special operations (methods)
     generate_method_overloads(methods)
     for method in methods:
-        method['do_generate_method_configuration'] = (
-            method['do_not_check_signature'] and
-            not method['per_context_enabled_function'] and
-            # For overloaded methods, only generate one accessor
-            ('overload_index' not in method or method['overload_index'] == 1))
+        if 'overloads' in method:
+            overloads = method['overloads']
+            method['do_generate_method_configuration'] = (
+                overloads['do_not_check_signature_all'] and
+                not overloads['per_context_enabled_function_all'])
+        else:
+            method['do_generate_method_configuration'] = (
+                method['do_not_check_signature'] and
+                not method['per_context_enabled_function'] and
+                # Ignore any overload not handled by the case above
+                'overload_index' not in method)
 
     template_contents.update({
         'has_origin_safe_method_setter': any(
@@ -359,12 +365,15 @@ def generate_overloads(overloads):
 
     return {
         'deprecate_all_as': common_value(overloads, 'deprecate_as'),  # [DeprecateAs]
+        'do_not_check_signature_all': common_value(overloads, 'do_not_check_signature'),
         'length_tests_methods': length_tests_methods(effective_overloads_by_length),
         'minarg': lengths[0],
         # 1. Let maxarg be the length of the longest type list of the
         # entries in S.
         'maxarg': lengths[-1],
         'measure_all_as': common_value(overloads, 'measure_as'),  # [MeasureAs]
+        'per_context_enabled_function_all': common_value(overloads, 'per_context_enabled_function'),  # [PerContextEnabled]
+        'runtime_enabled_function_all': common_value(overloads, 'runtime_enabled_function'),  # [RuntimeEnabled]
         'valid_arities': lengths
             # Only need to report valid arities if there is a gap in the
             # sequence of possible lengths, otherwise invalid length means
@@ -687,7 +696,9 @@ def resolution_tests_methods(effective_overloads):
                 pass
 
     # (Perform automatic type conversion, in order. If any of these match,
-    # that’s the end, and no other tests are needed.)
+    # that’s the end, and no other tests are needed.) To keep this code simple,
+    # we rely on the C++ compiler's dead code elimination to deal with the
+    # redundancy if both cases below trigger.
 
     # 11. Otherwise: if there is an entry in S that has one of the following
     # types at position i of its type list,
@@ -697,7 +708,6 @@ def resolution_tests_methods(effective_overloads):
         method = next(method for idl_type, method in idl_types_methods
                       if idl_type.name == 'String' or idl_type.is_enum)
         yield 'true', method
-        return
     except StopIteration:
         pass
 
@@ -708,7 +718,6 @@ def resolution_tests_methods(effective_overloads):
         method = next(method for idl_type, method in idl_types_methods
                       if idl_type.is_numeric_type)
         yield 'true', method
-        return
     except StopIteration:
         pass