[es6] do not add caller/arguments to ES6 function definitions

test/webkit/fast/js/caller-property-expected.txt

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-This tests for caller property in functions. Only functions that are called from inside of other functions and have a parent should have this property set. Tests return true when caller is found and false when the caller is null.
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-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
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-PASS childHasCallerWhenExecutingGlobalCode is false
-PASS childHasCallerWhenCalledWithoutParent is false
-PASS childHasCallerWhenCalledFromWithinParent is true
-PASS nonStrictCaller(nonStrictCallee) is nonStrictCaller
-FAIL nonStrictCaller(strictCallee) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-FAIL strictCaller(nonStrictCallee) should throw TypeError: Function.caller used to retrieve strict caller. Was null.
-FAIL strictCaller(strictCallee) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-PASS nonStrictCaller(boundNonStrictCallee) is nonStrictCaller
-FAIL nonStrictCaller(boundStrictCallee) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-FAIL strictCaller(boundNonStrictCallee) should throw TypeError: Function.caller used to retrieve strict caller. Was null.
-FAIL strictCaller(boundStrictCallee) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-PASS nonStrictGetter(nonStrictAccessor) is nonStrictGetter
-PASS nonStrictSetter(nonStrictAccessor) is true
-FAIL nonStrictGetter(strictAccessor) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-FAIL nonStrictSetter(strictAccessor) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-FAIL strictGetter(nonStrictAccessor) should throw TypeError: Function.caller used to retrieve strict caller. Was null.
-FAIL strictSetter(nonStrictAccessor) should throw TypeError: Function.caller used to retrieve strict caller. Was undefined.
-FAIL strictGetter(strictAccessor) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-FAIL strictSetter(strictAccessor) should throw TypeError: Type error. Threw exception TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them.
-PASS successfullyParsed is true
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-TEST COMPLETE
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