https://bugs.webkit.org/show_bug.cgi?id=95295

Reviewed by Filip Pizlo.

This is a step toward removing ScopeChainNode. With a uniform representation
for objects in the scope chain, we can move data from ScopeChainNode
into JSScope.

* CMakeLists.txt:
* GNUmakefile.list.am:
* JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
* JavaScriptCore.xcodeproj/project.pbxproj:
* Target.pri: Build!

* interpreter/Interpreter.cpp:
(JSC::Interpreter::privateExecute):
* jit/JITStubs.cpp:
(JSC::DEFINE_STUB_FUNCTION):
* llint/LLIntSlowPaths.cpp:
(JSC::LLInt::LLINT_SLOW_PATH_DECL): Use an explicit JSWithScope object
for 'with' statements. Since 'with' can put any object in the scope
chain, we'll need an adapter object to hold the data ScopeChainNode
currently holds.

* runtime/JSGlobalData.cpp:
(JSC::JSGlobalData::JSGlobalData):
* runtime/JSGlobalData.h:
(JSGlobalData): Support for JSWithScope.

* runtime/JSScope.cpp:
(JSC::JSScope::objectAtScope):
* runtime/JSScope.h: Check for and unwrap JSWithScope.

* runtime/JSType.h: Support for JSWithScope.

* runtime/StrictEvalActivation.cpp:
(JSC::StrictEvalActivation::StrictEvalActivation):
* runtime/StrictEvalActivation.h:
(StrictEvalActivation): Inherit from JSScope, to make the scope chain uniform.

* runtime/JSWithScope.cpp: Added.
(JSC::JSWithScope::visitChildren):
* runtime/JSWithScope.h: Added.
(JSWithScope):
(JSC::JSWithScope::create):
(JSC::JSWithScope::object):
(JSC::JSWithScope::createStructure):
(JSC::JSWithScope::JSWithScope): New adapter object. Since this object
is never exposed to scripts, it doesn't need any meaningful implementation
of property access or other callbacks.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@127010 268f45cc-cd09-0410-ab3c-d52691b4dbfc