Get rid of JSNameScope::m_type

Get rid of JSNameScope::m_type
https://bugs.webkit.org/show_bug.cgi?id=141851

Reviewed by Geoffrey Garen.

This is a big step towards getting rid of JSEnvironmentRecord::m_registers. To do it we need
to ensure that subclasses of JSEnvironmentRecord never have additional C++ fields, so that
JSEnvironmentRecord can always place "registers" right after the end of itself.

* CMakeLists.txt:
* JavaScriptCore.vcxproj/JavaScriptCore.vcxproj:
* JavaScriptCore.xcodeproj/project.pbxproj:
* debugger/DebuggerScope.cpp:
(JSC::DebuggerScope::isCatchScope):
(JSC::DebuggerScope::isFunctionNameScope):
* interpreter/Interpreter.cpp:
(JSC::Interpreter::execute):
* jit/JITOperations.cpp:
* llint/LLIntSlowPaths.cpp:
(JSC::LLInt::LLINT_SLOW_PATH_DECL):
* runtime/JSCatchScope.cpp: Added.
* runtime/JSCatchScope.h: Added.
(JSC::JSCatchScope::JSCatchScope):
(JSC::JSCatchScope::create):
(JSC::JSCatchScope::createStructure):
* runtime/JSFunction.cpp:
(JSC::JSFunction::addNameScopeIfNeeded):
* runtime/JSFunctionNameScope.cpp: Added.
* runtime/JSFunctionNameScope.h: Added.
(JSC::JSFunctionNameScope::JSFunctionNameScope):
(JSC::JSFunctionNameScope::create):
(JSC::JSFunctionNameScope::createStructure):
* runtime/JSGlobalObject.cpp:
(JSC::JSGlobalObject::init):
(JSC::JSGlobalObject::visitChildren):
* runtime/JSGlobalObject.h:
(JSC::JSGlobalObject::catchScopeStructure):
(JSC::JSGlobalObject::functionNameScopeStructure):
(JSC::JSGlobalObject::nameScopeStructure): Deleted.
* runtime/JSNameScope.cpp:
(JSC::JSNameScope::create):
* runtime/JSNameScope.h:
(JSC::JSNameScope::create):
(JSC::JSNameScope::JSNameScope):
(JSC::JSNameScope::createStructure): Deleted.
(JSC::JSNameScope::isFunctionNameScope): Deleted.
(JSC::JSNameScope::isCatchScope): Deleted.
* runtime/JSObject.cpp:
(JSC::JSObject::isCatchScopeObject):
(JSC::JSObject::isFunctionNameScopeObject):
* runtime/JSObject.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@180460 268f45cc-cd09-0410-ab3c-d52691b4dbfc