Special-case LocalDOMWindow for same-origin access in bindings.

third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl

Index: third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
diff --git a/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl b/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
index 5acc271f5b09ce22838c48f5bbefb94d0b58689a..86c62839d3f51f6b9957341626a8f9b63b622db7 100644
--- a/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
+++ b/third_party/WebKit/Source/bindings/templates/attributes.cpp.tmpl
@@ -43,8 +43,12 @@ const v8::FunctionCallbackInfo<v8::Value>& info
   {% endif %}
 
   {% if not attribute.is_static %}
+  {% if interface_name == 'Window' and not attribute.has_cross_origin_getter %}
+  LocalDOMWindow* impl = toLocalDOMWindow({{v8_class}}::toImpl(holder));

[haraken, 2017/02/03 09:03:18]

Add a comment and explain what it's doing.

[dcheng, 2017/02/03 10:04:26]

Done.

+  {% else %}
   {{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
   {% endif %}
+  {% endif %}
 
   {% if attribute.cached_attribute_validation_method %}
   // [CachedAttribute]
@@ -282,9 +286,13 @@ v8::Local<v8::Value> v8Value, const v8::FunctionCallbackInfo<v8::Value>& info
   if (!impl)
     return;
   {% else %}
+  {% if interface_name == 'Window' and not attribute.has_cross_origin_setter %}
+  LocalDOMWindow* impl = toLocalDOMWindow({{v8_class}}::toImpl(holder));
+  {% else %}
   {{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
   {% endif %}
   {% endif %}
+  {% endif %}
 
   {% if attribute.is_check_security_for_receiver and not attribute.is_data_type_property %}
   // Perform a security check for the receiver object.