[bindings] partial interfaces should not violate componentization

Source/bindings/templates/methods.cpp

 {##############################################################################}
 {% macro generate_method(method, world_suffix) %}
 {% filter conditional(method.conditional_string) %}
 static void {{method.name}}{{method.overload_index}}Method{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     {# Local variables #}
     {% if method.has_exception_state %}
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "{{method.name}}", "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% endif %}
     {# Overloaded methods have length checked during overload resolution #}
@@ skipping 363 matching lines @@
     {% endif %}
     {# First resolve by length #}
     {# 2. Initialize argcount to be min(maxarg, n). #}
     switch (std::min({{overloads.maxarg}}, info.Length())) {
     {# 3. Remove from S all entries whose type list is not of length argcount. #}
     {% for length, tests_methods in overloads.length_tests_methods %}
     {# 10. If i = d, then: #}
     case {{length}}:
         {# Then resolve by testing argument #}
         {% for test, method in tests_methods %}
+        {% if method.visible %}
         {% filter runtime_enabled(not overloads.runtime_enabled_function_all and
                                   method.runtime_enabled_function) %}
         if ({{test}}) {
             {% if method.measure_as and not overloads.measure_all_as %}
             UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{method.measure_as}});
             {% endif %}
             {% if method.deprecate_as and not overloads.deprecate_all_as %}
             UseCounter::countDeprecationIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()), UseCounter::{{method.deprecate_as}});
             {% endif %}
             {{method.name}}{{method.overload_index}}Method{{world_suffix}}(info);
             return;
         }
         {% endfilter %}
+        {% endif %}
         {% endfor %}
         break;
     {% endfor %}
+    {% if is_partial or not overloads.has_partial_overloads %}
     default:
+        {# If methods are overloaded between interface and partial interface #}
+        {# definitions, need to invoke methods defined in the partial #}
+        {# interface. #}
+        {# FIXME: we do not need to always generate this code. #}
         {# Invalid arity, throw error #}
         {# Report full list of valid arities if gaps and above minimum #}
         {% if overloads.valid_arities %}
         if (info.Length() >= {{overloads.minarg}}) {
             setArityTypeError(exceptionState, "{{overloads.valid_arities}}", info.Length());
             exceptionState.throwIfNeeded();
             return;
         }
         {% endif %}
         {# Otherwise just report "not enough arguments" #}
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments({{overloads.minarg}}, info.Length()));
         exceptionState.throwIfNeeded();
         return;
+    {% endif %}
     }
+    {% if not is_partial and overloads.has_partial_overloads %}
+    ASSERT({{overloads.name}}MethodForPartialInterface);
+    ({{overloads.name}}MethodForPartialInterface)(info);
+    {% else %}
     {# No match, throw error #}
     exceptionState.throwTypeError("No function was found that matched the signature provided.");
     exceptionState.throwIfNeeded();
+    {% endif %}
 }
 {% endmacro %}
 
 
 {##############################################################################}
 {% macro method_callback(method, world_suffix) %}
 {% filter conditional(method.conditional_string) %}
 static void {{method.name}}MethodCallback{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
@@ skipping 14 matching lines @@
     if (contextData && contextData->activityLogger()) {
     {% endif %}
         ExceptionState exceptionState(ExceptionState::ExecutionContext, "{{method.name}}", "{{interface_name}}", info.Holder(), info.GetIsolate());
         Vector<v8::Handle<v8::Value> > loggerArgs = toImplArguments<v8::Handle<v8::Value> >(info, 0, exceptionState);
         contextData->activityLogger()->logMethod("{{interface_name}}.{{method.name}}", info.Length(), loggerArgs.data());
     }
     {% endif %}
     {% if method.is_custom %}
     {{v8_class}}::{{method.name}}MethodCustom(info);
     {% else %}
-    {{cpp_class}}V8Internal::{{method.name}}Method{{world_suffix}}(info);
+    {{cpp_class_or_partial}}V8Internal::{{method.name}}Method{{world_suffix}}(info);
     {% endif %}
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 {% endfilter %}
 {% endmacro %}
 
 
 {##############################################################################}
 {% macro origin_safe_method_getter(method, world_suffix) %}
 static void {{method.name}}OriginSafeMethodGetter{{world_suffix}}(const v8::PropertyCallbackInfo<v8::Value>& info)
@@ skipping 133 matching lines @@
 V8DOMWrapper::associateObjectWithWrapper<{{v8_class}}>(impl.release(), &{{constructor_class}}::wrapperTypeInfo, wrapper, info.GetIsolate());
 {% endif %}
 {% endif %}
 v8SetReturnValue(info, wrapper);
 {% endmacro %}
 
 
 {##############################################################################}
 {% macro method_configuration(method) %}
 {% set method_callback =
-   '%sV8Internal::%sMethodCallback' % (cpp_class, method.name) %}
+   '%sV8Internal::%sMethodCallback' % (cpp_class_or_partial, method.name) %}
 {% set method_callback_for_main_world =
-   '%sV8Internal::%sMethodCallbackForMainWorld' % (cpp_class, method.name)
+   '%sV8Internal::%sMethodCallbackForMainWorld' % (cpp_class_or_partial, method.name)
    if method.is_per_world_bindings else '0' %}
 {% set only_exposed_to_private_script = 'V8DOMConfiguration::OnlyExposedToPrivateScript' if method.only_exposed_to_private_script else 'V8DOMConfiguration::ExposedToAllScripts' %}
 {"{{method.name}}", {{method_callback}}, {{method_callback_for_main_world}}, {{method.length}}, {{only_exposed_to_private_script}}}
 {%- endmacro %}
 
 
 {######################################}
 {% macro install_custom_signature(method) %}
-{% set method_callback = '%sV8Internal::%sMethodCallback' % (cpp_class, method.name) %}
+{% set method_callback = '%sV8Internal::%sMethodCallback' % (cpp_class_or_partial, method.name) %}
 {% set method_callback_for_main_world = '%sForMainWorld' % method_callback
   if method.is_per_world_bindings else '0' %}
 {% set property_attribute =
   'static_cast<v8::PropertyAttribute>(%s)' % ' | '.join(method.property_attributes)
   if method.property_attributes else 'v8::None' %}
 {% set only_exposed_to_private_script = 'V8DOMConfiguration::OnlyExposedToPrivateScript' if method.only_exposed_to_private_script else 'V8DOMConfiguration::ExposedToAllScripts' %}
 static const V8DOMConfiguration::MethodConfiguration {{method.name}}MethodConfiguration = {
     "{{method.name}}", {{method_callback}}, {{method_callback_for_main_world}}, {{method.length}}, {{only_exposed_to_private_script}},
 };
 V8DOMConfiguration::installMethod({{method.function_template}}, {{method.signature}}, {{property_attribute}}, {{method.name}}MethodConfiguration, isolate);
 {%- endmacro %}
+
+{######################################}
+{% macro install_conditionally_enabled_methods() %}
+void {{v8_class_or_partial}}::installConditionallyEnabledMethods(v8::Handle<v8::Object> prototypeObject, v8::Isolate* isolate)
+{
+    {% if is_partial %}
+    {{v8_class}}::installConditionallyEnabledMethods(prototypeObject, isolate);
+    {% endif %}
+    {% if conditionally_enabled_methods %}
+    {# Define per-context enabled operations #}
+    v8::Local<v8::Signature> defaultSignature = v8::Signature::New(isolate, domTemplate(isolate));
+    ExecutionContext* context = toExecutionContext(prototypeObject->CreationContext());
+    ASSERT(context);
+
+    {% for method in conditionally_enabled_methods %}
+    {% filter per_context_enabled(method.per_context_enabled_function) %}
+    {% filter exposed(method.exposed_test) %}
+    prototypeObject->Set(v8AtomicString(isolate, "{{method.name}}"), v8::FunctionTemplate::New(isolate, {{cpp_class_or_partial}}V8Internal::{{method.name}}MethodCallback, v8Undefined(), defaultSignature, {{method.number_of_required_arguments}})->GetFunction());
+    {% endfilter %}
+    {% endfilter %}
+    {% endfor %}
+    {% endif %}
+}
+{%- endmacro %}