Add attributes field to PropertySlot

Reviewed by Geoff Garen.

For all JSC types, this makes getOwnPropertyDescriptor redundant.
There will be a bit more hacking required in WebCore to remove GOPD whilst maintaining current behaviour.
(Current behaviour is in many ways broken, particularly in that GOPD & GOPS are inconsistent, but we should fix incrementally).

Source/JavaScriptCore: 

No performance impact.

* runtime/PropertySlot.h:
(JSC::PropertySlot::setValue):
(JSC::PropertySlot::setCustom):
(JSC::PropertySlot::setCacheableCustom):
(JSC::PropertySlot::setCustomIndex):
(JSC::PropertySlot::setGetterSlot):
(JSC::PropertySlot::setCacheableGetterSlot):
    - These mathods now all require 'attributes'.
* runtime/JSObject.h:
(JSC::JSObject::getDirect):
(JSC::JSObject::getDirectOffset):
(JSC::JSObject::inlineGetOwnPropertySlot):
    - Added variants of getDirect, getDirectOffset that return the attributes.
* API/JSCallbackObjectFunctions.h:
(JSC::::getOwnPropertySlot):
* runtime/Arguments.cpp:
(JSC::Arguments::getOwnPropertySlotByIndex):
(JSC::Arguments::getOwnPropertySlot):
* runtime/JSActivation.cpp:
(JSC::JSActivation::symbolTableGet):
(JSC::JSActivation::getOwnPropertySlot):
* runtime/JSArray.cpp:
(JSC::JSArray::getOwnPropertySlot):
* runtime/JSArrayBuffer.cpp:
(JSC::JSArrayBuffer::getOwnPropertySlot):
* runtime/JSArrayBufferView.cpp:
(JSC::JSArrayBufferView::getOwnPropertySlot):
* runtime/JSDataView.cpp:
(JSC::JSDataView::getOwnPropertySlot):
* runtime/JSFunction.cpp:
(JSC::JSFunction::getOwnPropertySlot):
* runtime/JSGenericTypedArrayViewInlines.h:
(JSC::::getOwnPropertySlot):
(JSC::::getOwnPropertySlotByIndex):
* runtime/JSObject.cpp:
(JSC::JSObject::getOwnPropertySlotByIndex):
(JSC::JSObject::fillGetterPropertySlot):
* runtime/JSString.h:
(JSC::JSString::getStringPropertySlot):
* runtime/JSSymbolTableObject.h:
(JSC::symbolTableGet):
* runtime/Lookup.cpp:
(JSC::setUpStaticFunctionSlot):
* runtime/Lookup.h:
(JSC::getStaticPropertySlot):
(JSC::getStaticPropertyDescriptor):
(JSC::getStaticValueSlot):
(JSC::getStaticValueDescriptor):
* runtime/RegExpObject.cpp:
(JSC::RegExpObject::getOwnPropertySlot):
* runtime/SparseArrayValueMap.cpp:
(JSC::SparseArrayEntry::get):
    - Pass attributes to PropertySlot::set* methods.

Source/WebCore: 

* bindings/js/JSCSSStyleDeclarationCustom.cpp:
(WebCore::JSCSSStyleDeclaration::getOwnPropertySlotDelegate):
* bindings/js/JSDOMWindowCustom.cpp:
(WebCore::JSDOMWindow::getOwnPropertySlot):
(WebCore::JSDOMWindow::getOwnPropertySlotByIndex):
(WebCore::JSDOMWindow::getOwnPropertyDescriptor):
* bindings/js/JSHistoryCustom.cpp:
(WebCore::JSHistory::getOwnPropertySlotDelegate):
(WebCore::JSHistory::getOwnPropertyDescriptorDelegate):
* bindings/js/JSLocationCustom.cpp:
(WebCore::JSLocation::getOwnPropertySlotDelegate):
(WebCore::JSLocation::getOwnPropertyDescriptorDelegate):
* bindings/js/JSPluginElementFunctions.cpp:
(WebCore::runtimeObjectCustomGetOwnPropertySlot):
(WebCore::runtimeObjectCustomGetOwnPropertyDescriptor):
* bindings/scripts/CodeGeneratorJS.pm:
(GenerateGetOwnPropertySlotBody):
(GenerateGetOwnPropertyDescriptorBody):
(GenerateImplementation):
* bridge/runtime_array.cpp:
(JSC::RuntimeArray::getOwnPropertySlot):
(JSC::RuntimeArray::getOwnPropertyDescriptor):
(JSC::RuntimeArray::getOwnPropertySlotByIndex):
* bridge/runtime_method.cpp:
(JSC::RuntimeMethod::getOwnPropertySlot):
(JSC::RuntimeMethod::getOwnPropertyDescriptor):
* bridge/runtime_object.cpp:
(JSC::Bindings::RuntimeObject::getOwnPropertySlot):
(JSC::Bindings::RuntimeObject::getOwnPropertyDescriptor):
    - Pass attributes to PropertySlot::set* methods.

Source/WebKit2: 

* WebProcess/Plugins/Netscape/JSNPObject.cpp:
(WebKit::JSNPObject::getOwnPropertySlot):
(WebKit::JSNPObject::getOwnPropertyDescriptor):
    - Pass attributes to PropertySlot::set* methods.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154253 268f45cc-cd09-0410-ab3c-d52691b4dbfc