[OriginTrials] Allow origin trials to be installed without an instance object.

third_party/WebKit/Source/bindings/templates/interface_base.cpp

Index: third_party/WebKit/Source/bindings/templates/interface_base.cpp
diff --git a/third_party/WebKit/Source/bindings/templates/interface_base.cpp b/third_party/WebKit/Source/bindings/templates/interface_base.cpp
index 7f93dd3159ad842faaa9cd1cf495aafe4d43fdb0..61f832f677a4da30a48d1660825e288062afd4a5 100644
--- a/third_party/WebKit/Source/bindings/templates/interface_base.cpp
+++ b/third_party/WebKit/Source/bindings/templates/interface_base.cpp
@@ -368,23 +368,21 @@ static void install{{v8_class}}Template(v8::Isolate* isolate, const DOMWrapperWo
 {% from 'attributes.cpp' import attribute_configuration with context %}
 {% from 'constants.cpp' import constant_configuration with context %}
 {% from 'methods.cpp' import method_configuration with context %}
-{% for origin_trial_feature_name in origin_trial_feature_names %}{{newline}}
-void {{v8_class_or_partial}}::install{{origin_trial_feature_name}}(ScriptState* scriptState, v8::Local<v8::Object> instance)
+{% for origin_trial_feature in origin_trial_features %}{{newline}}
+void {{v8_class_or_partial}}::install{{origin_trial_feature.name}}(ScriptState* scriptState, v8::Local<v8::Object> instance)
 {
-    v8::Local<v8::Object> prototype = instance->GetPrototype()->ToObject(scriptState->isolate());
-
-    {# Origin-Trial-enabled attributes #}
-    {% if attributes | for_origin_trial_feature(origin_trial_feature_name) or
-          methods | method_for_origin_trial_feature(origin_trial_feature_name, is_partial) %}
-    V8PerIsolateData* perIsolateData = V8PerIsolateData::from(scriptState->isolate());
-    v8::Local<v8::FunctionTemplate> interfaceTemplate = perIsolateData->findInterfaceTemplate(scriptState->world(), &{{v8_class}}::wrapperTypeInfo);
+    {% if attributes | for_origin_trial_feature(origin_trial_feature.name) or
+          methods | method_for_origin_trial_feature(origin_trial_feature.name, is_partial) %}
+    v8::Local<v8::FunctionTemplate> interfaceTemplate = {{v8_class}}::wrapperTypeInfo.domTemplate(scriptState->isolate(), scriptState->world());
     v8::Local<v8::Signature> signature = v8::Signature::New(scriptState->isolate(), interfaceTemplate);
     ALLOW_UNUSED_LOCAL(signature);
     {% endif %}
     V8PerContextData* perContextData = V8PerContextData::from(scriptState->context());
+    v8::Local<v8::Object> prototype = perContextData->prototypeForType(&{{v8_class}}::wrapperTypeInfo);
     v8::Local<v8::Function> interface = perContextData->constructorForType(&{{v8_class}}::wrapperTypeInfo);
     ALLOW_UNUSED_LOCAL(interface);
-    {% for attribute in attributes | for_origin_trial_feature(origin_trial_feature_name) | unique_by('name') | sort %}
+    {# Origin-Trial-enabled attributes #}
+    {% for attribute in attributes | for_origin_trial_feature(origin_trial_feature.name) | unique_by('name') | sort %}
     {% if attribute.is_data_type_property %}
     const V8DOMConfiguration::AttributeConfiguration attribute{{attribute.name}}Configuration = \
         {{attribute_configuration(attribute)}};
@@ -396,18 +394,25 @@ void {{v8_class_or_partial}}::install{{origin_trial_feature_name}}(ScriptState*
     {% endif %}
     {% endfor %}
     {# Origin-Trial-enabled constants #}
-    {% for constant in constants | for_origin_trial_feature(origin_trial_feature_name) | unique_by('name') | sort %}
+    {% for constant in constants | for_origin_trial_feature(origin_trial_feature.name) | unique_by('name') | sort %}
     {% set constant_name = constant.name.title().replace('_', '') %}
     const V8DOMConfiguration::ConstantConfiguration constant{{constant_name}}Configuration = {{constant_configuration(constant)}};
     V8DOMConfiguration::installConstant(scriptState->isolate(), interface, prototype, constant{{constant_name}}Configuration);
     {% endfor %}
     {# Origin-Trial-enabled methods (no overloads) #}
-    {% for method in methods | method_for_origin_trial_feature(origin_trial_feature_name, is_partial) | unique_by('name') | sort %}
+    {% for method in methods | method_for_origin_trial_feature(origin_trial_feature.name, is_partial) | unique_by('name') | sort %}
     {% set method_name = method.name.title().replace('_', '') %}
     const V8DOMConfiguration::MethodConfiguration method{{method_name}}Configuration = {{method_configuration(method)}};
     V8DOMConfiguration::installMethod(scriptState->isolate(), scriptState->world(), instance, prototype, interface, signature, method{{method_name}}Configuration);
     {% endfor %}
 }
+{% if not origin_trial_feature.needs_instance %}
+
+void {{v8_class_or_partial}}::install{{origin_trial_feature.name}}(ScriptState* scriptState)
+{
+    install{{origin_trial_feature.name}}(scriptState, v8::Local<v8::Object>());
+}
+{% endif %}
 {% endfor %}
 {% endblock %}
 {##############################################################################}