to make behaviour more explicit.  Add createFromUTF8 to UString (wrapping method
on UString::Rep), since other cases of transliteration (e.g.  from ascii) are
performed in UString constructors.  Add/use setHash & size() accessors on Rep,
rather than accessing _hash/len directly.

Reviewed by Sam Weinig.

* API/JSClassRef.cpp:
(OpaqueJSClass::OpaqueJSClass):
* API/OpaqueJSString.cpp:
(OpaqueJSString::ustring):
* JavaScriptCore.exp:
* runtime/ArrayPrototype.cpp:
(JSC::arrayProtoFuncToString):
* runtime/Identifier.cpp:
(JSC::Identifier::equal):
(JSC::CStringTranslator::translate):
(JSC::UCharBufferTranslator::translate):
(JSC::Identifier::addSlowCase):
* runtime/JSString.cpp:
(JSC::JSString::resolveRope):
* runtime/JSString.h:
(JSC::JSString::Rope::Fiber::refAndGetLength):
(JSC::JSString::Rope::append):
* runtime/StringBuilder.h:
(JSC::StringBuilder::release):
* runtime/StringConstructor.cpp:
(JSC::stringFromCharCodeSlowCase):
* runtime/StringPrototype.cpp:
(JSC::substituteBackreferencesSlow):
(JSC::stringProtoFuncToLowerCase):
(JSC::stringProtoFuncToUpperCase):
(JSC::stringProtoFuncFontsize):
(JSC::stringProtoFuncLink):
* runtime/UString.cpp:
(JSC::UString::UString):
(JSC::UString::createNonCopying):
(JSC::UString::createFromUTF8):
* runtime/UString.h:
(JSC::UString::Rep::setHash):
(JSC::UString::~UString):
(JSC::makeString):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@52346 268f45cc-cd09-0410-ab3c-d52691b4dbfc