[JSC] MAYBE_MISSING_PARAMETER(..., DefaultIsNullString) macro is redundant
https://bugs.webkit.org/show_bug.cgi?id=109902

Reviewed by Adam Barth.

Currently:

- MAYBE_MISSING_PARAMETER(exec, index, DefaultIsUndefined)
  returns exec->argument(index).
- MAYBE_MISSING_PARAMETER(exec, index, DefaultIsNullString)
  returns JSValue() if exec->argument(index) is missing
  (i.e. the length of the argument is less than index).
  It returns exec->argument(index) otherwise.

No one other than CodeGeneratorJS.pm uses
MAYBE_MISSING_PARAMETER(exec, index, DefaultIsUndefined).
Instead, we simply use exec->argument(index). We should remove
the redundant usage in CodeGeneratorJS.pm too. The long-name macro
has been making generated code less readable.

In addition, we can rename MAYBE_MISSING_PARAMETER() to argumentOrNull().

c.f. corresponding V8 bug: https://bugs.webkit.org/show_bug.cgi?id=109899

No tests. No change in behavior.

* bindings/js/JSDOMBinding.h:
(WebCore):
* bindings/scripts/CodeGeneratorJS.pm:
(GenerateParametersCheck):
* bindings/scripts/test/JS/JSFloat64Array.cpp:
(WebCore::jsFloat64ArrayPrototypeFunctionFoo):
* bindings/scripts/test/JS/JSTestActiveDOMObject.cpp:
(WebCore::jsTestActiveDOMObjectPrototypeFunctionExcitingFunction):
(WebCore::jsTestActiveDOMObjectPrototypeFunctionPostMessage):
* bindings/scripts/test/JS/JSTestCustomNamedGetter.cpp:
(WebCore::jsTestCustomNamedGetterPrototypeFunctionAnotherFunction):
* bindings/scripts/test/JS/JSTestEventTarget.cpp:
(WebCore::jsTestEventTargetPrototypeFunctionItem):
(WebCore::jsTestEventTargetPrototypeFunctionDispatchEvent):
* bindings/scripts/test/JS/JSTestInterface.cpp:
(WebCore::JSTestInterfaceConstructor::constructJSTestInterface):
(WebCore::jsTestInterfacePrototypeFunctionSupplementalMethod2):
* bindings/scripts/test/JS/JSTestMediaQueryListListener.cpp:
(WebCore::jsTestMediaQueryListListenerPrototypeFunctionMethod):
* bindings/scripts/test/JS/JSTestNamedConstructor.cpp:
(WebCore::JSTestNamedConstructorNamedConstructor::constructJSTestNamedConstructor):
* bindings/scripts/test/JS/JSTestObj.cpp:
(WebCore::jsTestObjPrototypeFunctionVoidMethodWithArgs):
(WebCore::jsTestObjPrototypeFunctionLongMethodWithArgs):
(WebCore::jsTestObjPrototypeFunctionObjMethodWithArgs):
(WebCore::jsTestObjPrototypeFunctionMethodWithSequenceArg):
(WebCore::jsTestObjPrototypeFunctionMethodReturningSequence):
(WebCore::jsTestObjPrototypeFunctionMethodThatRequiresAllArgsAndThrows):
(WebCore::jsTestObjPrototypeFunctionSerializedValue):
(WebCore::jsTestObjPrototypeFunctionOptionsObject):
(WebCore::jsTestObjPrototypeFunctionMethodWithOptionalArg):
(WebCore::jsTestObjPrototypeFunctionMethodWithNonOptionalArgAndOptionalArg):
(WebCore::jsTestObjPrototypeFunctionMethodWithNonOptionalArgAndTwoOptionalArgs):
(WebCore::jsTestObjPrototypeFunctionMethodWithOptionalString):
(WebCore::jsTestObjPrototypeFunctionMethodWithOptionalStringIsUndefined):
(WebCore::jsTestObjPrototypeFunctionMethodWithOptionalStringIsNullString):
(WebCore::jsTestObjPrototypeFunctionMethodWithNonCallbackArgAndCallbackArg):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod1):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod2):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod3):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod4):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod6):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod7):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod8):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod9):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod10):
(WebCore::jsTestObjPrototypeFunctionOverloadedMethod11):
(WebCore::jsTestObjConstructorFunctionClassMethodWithOptional):
(WebCore::jsTestObjConstructorFunctionOverloadedMethod11):
(WebCore::jsTestObjConstructorFunctionOverloadedMethod12):
(WebCore::jsTestObjPrototypeFunctionMethodWithUnsignedLongSequence):
(WebCore::jsTestObjPrototypeFunctionStringArrayFunction):
(WebCore::jsTestObjPrototypeFunctionDomStringListFunction):
(WebCore::jsTestObjPrototypeFunctionConvert1):
(WebCore::jsTestObjPrototypeFunctionConvert2):
(WebCore::jsTestObjPrototypeFunctionConvert4):
(WebCore::jsTestObjPrototypeFunctionConvert5):
(WebCore::jsTestObjPrototypeFunctionStrictFunction):
(WebCore::jsTestObjPrototypeFunctionVariadicStringMethod):
(WebCore::jsTestObjPrototypeFunctionVariadicDoubleMethod):
(WebCore::jsTestObjPrototypeFunctionVariadicNodeMethod):
* bindings/scripts/test/JS/JSTestOverloadedConstructors.cpp:
(WebCore::JSTestOverloadedConstructorsConstructor::constructJSTestOverloadedConstructors1):
(WebCore::JSTestOverloadedConstructorsConstructor::constructJSTestOverloadedConstructors2):
(WebCore::JSTestOverloadedConstructorsConstructor::constructJSTestOverloadedConstructors3):
(WebCore::JSTestOverloadedConstructorsConstructor::constructJSTestOverloadedConstructors4):
* bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.cpp:
(WebCore::JSTestSerializedScriptValueInterfaceConstructor::constructJSTestSerializedScriptValueInterface):
(WebCore::jsTestSerializedScriptValueInterfacePrototypeFunctionAcceptTransferList):
(WebCore::jsTestSerializedScriptValueInterfacePrototypeFunctionMultiTransferList):
* bindings/scripts/test/JS/JSTestTypedefs.cpp:
(WebCore::JSTestTypedefsConstructor::constructJSTestTypedefs):
(WebCore::jsTestTypedefsPrototypeFunctionFunc):
(WebCore::jsTestTypedefsPrototypeFunctionMultiTransferList):
(WebCore::jsTestTypedefsPrototypeFunctionSetShadow):
(WebCore::jsTestTypedefsPrototypeFunctionMethodWithSequenceArg):
(WebCore::jsTestTypedefsPrototypeFunctionNullableArrayArg):
(WebCore::jsTestTypedefsPrototypeFunctionStringArrayFunction):
(WebCore::jsTestTypedefsPrototypeFunctionStringArrayFunction2):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143304 268f45cc-cd09-0410-ab3c-d52691b4dbfc