[Bindings] Declare signature and executionContext once

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

 {% from 'utilities.cpp.tmpl' import declare_enum_validation_variable, v8_value_to_local_cpp_value %}
 
 {##############################################################################}
 {% macro generate_method(method, world_suffix) %}
 static void {{method.name}}{{method.overload_index}}Method{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info) {
   {% filter format_remove_duplicates([
       'ExceptionState exceptionState',
       'ScriptState* scriptState = ']) %}
   {% set define_exception_state -%}
   ExceptionState exceptionState(info.GetIsolate(), ExceptionState::ExecutionContext, "{{interface_name}}", "{{method.name}}");
@@ skipping 625 matching lines @@
 {######################################}
 {% macro install_custom_signature(method, instance_template, prototype_template, interface_template, signature) %}
 const V8DOMConfiguration::MethodConfiguration {{method.name}}MethodConfiguration = {{method_configuration(method)}};
 V8DOMConfiguration::installMethod(isolate, world, {{instance_template}}, {{prototype_template}}, {{interface_template}}, {{signature}}, {{method.name}}MethodConfiguration);
 {%- endmacro %}
 
 
 {######################################}
 {% macro install_conditionally_enabled_methods() %}
 {% if methods | conditionally_exposed(is_partial) %}
-{# Define operations with limited exposure #}
-v8::Local<v8::Signature> signature = v8::Signature::New(isolate, interfaceTemplate);
-ExecutionContext* executionContext = toExecutionContext(prototypeObject->CreationContext());
-DCHECK(executionContext);
 {% for method in methods | conditionally_exposed(is_partial) %}
 {% filter secure_context(method.overloads.secure_context_test_all
                          if method.overloads else
                          method.secure_context_test) %}
 {% filter exposed(method.overloads.exposed_test_all
                   if method.overloads else
                   method.exposed_test) %}
 {% filter runtime_enabled(method.overloads.runtime_enabled_all
                           if method.overloads else
                           method.runtime_enabled_feature_name) %}
 const V8DOMConfiguration::MethodConfiguration {{method.name}}MethodConfiguration = {{method_configuration(method)}};
 V8DOMConfiguration::installMethod(isolate, world, v8::Local<v8::Object>(), prototypeObject, interfaceObject, signature, {{method.name}}MethodConfiguration);
 {% endfilter %}{# runtime_enabled() #}
 {% endfilter %}{# exposed() #}
 {% endfilter %}{# secure_context() #}
 {% endfor %}
 {% endif %}
 {%- endmacro %}