[bindings] Implement an ExperimentEnabled IDL extended attribute.

third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp

 {% from 'conversions.cpp' import declare_enum_validation_variable %}
 {% include 'copyright_block.txt' %}
 #include "config.h"
 #include "{{v8_original_class}}.h"
 
 {% for filename in cpp_includes if filename != '%s.h' % v8_class %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
@@ skipping 23 matching lines @@
     {% if members %}
     v8::TryCatch block(isolate);
     v8::Local<v8::Object> v8Object;
     if (!v8Call(v8Value->ToObject(isolate->GetCurrentContext()), v8Object, block)) {
         exceptionState.rethrowV8Exception(block.Exception());
         return;
     }
     {% endif %}
     {% for member in members %}
     {% if member.runtime_enabled_function %}
-    if ({{member.runtime_enabled_function}}()) {
+    if ({{member.runtime_enabled_function}}) {
     {% else %}
     {
     {% endif %}
         v8::Local<v8::Value> {{member.name}}Value;
         if (!v8Object->Get(isolate->GetCurrentContext(), v8String(isolate, "{{member.name}}")).ToLocal(&{{member.name}}Value)) {
             exceptionState.rethrowV8Exception(block.Exception());
             return;
         }
         if ({{member.name}}Value.IsEmpty() || {{member.name}}Value->IsUndefined()) {
             {% if member.is_required %}
@@ skipping 70 matching lines @@
 }
 
 {{cpp_class}} NativeValueTraits<{{cpp_class}}>::nativeValue(v8::Isolate* isolate, v8::Local<v8::Value> value, ExceptionState& exceptionState)
 {
     {{cpp_class}} impl;
     {{v8_class}}::toImpl(isolate, value, impl, exceptionState);
     return impl;
 }
 
 } // namespace blink