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

third_party/WebKit/Source/bindings/templates/partial_interface.h

Index: third_party/WebKit/Source/bindings/templates/partial_interface.h
diff --git a/third_party/WebKit/Source/bindings/templates/partial_interface.h b/third_party/WebKit/Source/bindings/templates/partial_interface.h
index cfe97763b877537e21e0926b7fb6441a478c36e4..420328e08c92713b32463c168b1d0332c952fc00 100644
--- a/third_party/WebKit/Source/bindings/templates/partial_interface.h
+++ b/third_party/WebKit/Source/bindings/templates/partial_interface.h
@@ -28,8 +28,11 @@ public:
     {% endfor %}
     {# Custom internal fields #}
     static void preparePrototypeAndInterfaceObject(v8::Local<v8::Context>, const DOMWrapperWorld&, v8::Local<v8::Object>, v8::Local<v8::Function>, v8::Local<v8::FunctionTemplate>);
-    {% for origin_trial_feature_name in origin_trial_feature_names %}{{newline}}
-    static void install{{origin_trial_feature_name}}(ScriptState*, v8::Local<v8::Object> instance);
+    {% for origin_trial_feature in origin_trial_features %}{{newline}}
+    static void install{{origin_trial_feature.name}}(ScriptState*, v8::Local<v8::Object> instance);
+    {% if not origin_trial_feature.needs_instance %}
+    static void install{{origin_trial_feature.name}}(ScriptState*);
+    {% endif %}
     {% endfor %}
 private:
     static void install{{v8_class}}Template(v8::Isolate*, const DOMWrapperWorld&, v8::Local<v8::FunctionTemplate> interfaceTemplate);