Removed getDirectLocation and offsetForLocation and all their uses
https://bugs.webkit.org/show_bug.cgi?id=106692

Reviewed by Filip Pizlo.

getDirectLocation() and its associated offsetForLocation() relied on
detailed knowledge of the rules of PropertyOffset, JSObject, and
Structure, which is a hard thing to reverse-engineer reliably. Luckily,
it wasn't needed, and all clients either wanted a true value or a
PropertyOffset. So, I refactored accordingly.

* dfg/DFGOperations.cpp: Renamed putDirectOffset to putDirect, to clarify
that we are not putting an offset.

* runtime/JSActivation.cpp:
(JSC::JSActivation::getOwnPropertySlot): Get a value instead of a value
pointer, since we never wanted a pointer to begin with.

* runtime/JSFunction.cpp:
(JSC::JSFunction::getOwnPropertySlot): Use a PropertyOffset instead of a pointer,
so we don't have to reverse-engineer the offset from the pointer.

* runtime/JSObject.cpp:
(JSC::JSObject::put):
(JSC::JSObject::resetInheritorID):
(JSC::JSObject::inheritorID):
(JSC::JSObject::removeDirect):
(JSC::JSObject::fillGetterPropertySlot):
(JSC::JSObject::getOwnPropertyDescriptor): Renamed getDirectOffset and
putDirectOffset, as explaind above. We want to use the name "getDirectOffset"
for when the thing you're getting is the offset.

* runtime/JSObject.h:
(JSC::JSObject::getDirect):
(JSC::JSObject::getDirectOffset): Changed getDirectLocation to getDirectOffset,
since clients really wants PropertyOffsets and not locations.

(JSObject::offsetForLocation): Removed this function because it was hard
to get right.

(JSC::JSObject::putDirect):
(JSC::JSObject::putDirectUndefined):
(JSC::JSObject::inlineGetOwnPropertySlot):
(JSC::JSObject::putDirectInternal):
(JSC::JSObject::putDirectWithoutTransition):
* runtime/JSScope.cpp:
(JSC::executeResolveOperations):
(JSC::JSScope::resolvePut):
* runtime/JSValue.cpp:
(JSC::JSValue::putToPrimitive): Updated for renames.

* runtime/Lookup.cpp:
(JSC::setUpStaticFunctionSlot): Use a PropertyOffset instead of a pointer,
so we don't have to reverse-engineer the offset from the pointer.

* runtime/Structure.cpp:
(JSC::Structure::flattenDictionaryStructure): Updated for renames.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139491 268f45cc-cd09-0410-ab3c-d52691b4dbfc