Reviewed by Geoffrey Garen.

        Make StructureChain GC allocated
        https://bugs.webkit.org/show_bug.cgi?id=56695

        Make StructureChain GC allocated, and make the various owners
        mark it correctly.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::derefStructures):
        (JSC::CodeBlock::refStructures):
        (JSC::CodeBlock::markAggregate):
        * bytecode/Instruction.h:
        (JSC::PolymorphicAccessStructureList::PolymorphicStubInfo::set):
        (JSC::PolymorphicAccessStructureList::PolymorphicAccessStructureList):
        (JSC::PolymorphicAccessStructureList::derefStructures):
        (JSC::PolymorphicAccessStructureList::markAggregate):
        (JSC::Instruction::Instruction):
        * bytecode/StructureStubInfo.cpp:
        (JSC::StructureStubInfo::deref):
        (JSC::StructureStubInfo::markAggregate):
        * bytecode/StructureStubInfo.h:
        (JSC::StructureStubInfo::initGetByIdChain):
        (JSC::StructureStubInfo::initPutByIdTransition):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::emitJumpIfNotFunctionCall):
        (JSC::BytecodeGenerator::emitJumpIfNotFunctionApply):
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::privateExecute):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_jneq_ptr):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emit_op_jneq_ptr):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::privateCompileGetByIdChainList):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::privateCompileGetByIdChainList):
        * jit/JITStubs.cpp:
        (JSC::getPolymorphicAccessStructureListSlot):
        (JSC::DEFINE_STUB_FUNCTION):
        * runtime/JSCell.h:
        * runtime/JSGlobalData.cpp:
        (JSC::JSGlobalData::JSGlobalData):
        * runtime/JSGlobalData.h:
        * runtime/JSGlobalObject.cpp:
        (JSC::markIfNeeded):
        * runtime/JSGlobalObject.h:
        (JSC::Structure::prototypeChain):
        * runtime/JSObject.h:
        (JSC::JSObject::markChildrenDirect):
        * runtime/JSPropertyNameIterator.cpp:
        (JSC::JSPropertyNameIterator::create):
        (JSC::JSPropertyNameIterator::get):
        (JSC::JSPropertyNameIterator::markChildren):
        * runtime/JSPropertyNameIterator.h:
        (JSC::JSPropertyNameIterator::setCachedPrototypeChain):
        * runtime/MarkStack.h:
        (JSC::MarkStack::append):
        * runtime/Structure.h:
        (JSC::Structure::cachedPrototypeChainSlot):
        * runtime/StructureChain.cpp:
        (JSC::StructureChain::StructureChain):
        * runtime/StructureChain.h:
        (JSC::StructureChain::create):
        (JSC::StructureChain::createStructure):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@82500 268f45cc-cd09-0410-ab3c-d52691b4dbfc