Update mjsunit tests to be complaint with ES6 implementation of typed arrays

Update mjsunit tests to be complaian with ES6 implementation of typed arrays

R=rossberg@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=14575

[Dmitry Lomov (no reviews), 2013-05-07 13:21:29]

I have removed all non-ES6-complaint tests from our mjsunit tests. This is
structured so that our current d8 implementation passes (so at the moment, these
tests pass with or without --harmony-typed-arrays). All "new" tests (where d8
implementation fails but harmony typed arrays do not and should not) are in
harmony/typedarrays.js

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
File test/mjsunit/external-array-no-sse2.js (left):

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
test/mjsunit/external-array-no-sse2.js:57: 
This does not fail per ES6 spec

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
test/mjsunit/external-array-no-sse2.js:169: assertEquals(42,
a.BYTES_PER_ELEMENT);
Property is readonly per ES6 spec.

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
test/mjsunit/external-array-no-sse2.js:205: array_with_length_from_non_number =
new Int32Array(undefined);
Spec is currently unclear on what should happen for these cases (due to overload
resolution and array-like objects).
All these tests do not currently work in webkit implementation.

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
test/mjsunit/external-array-no-sse2.js:363: assertEquals(2, a.length);
'length' is now a property on the prototype so delete here has no effect.

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
test/mjsunit/external-array-no-sse2.js:543: 
a.subarray() is a valid call per ES6 (returns a copy of an array)

[rossberg, 2013-05-07 13:58:05]

LGTM with nit

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
File test/mjsunit/external-array-no-sse2.js (left):

https://codereview.chromium.org/14580012/diff/4001/test/mjsunit/external-arra...
test/mjsunit/external-array-no-sse2.js:168: a.BYTES_PER_ELEMENT = 42;
Did you want to remove this line, too?

[Dmitry Lomov (no reviews), 2013-05-07 14:03:58]

Committed patchset #1 manually as r14575 (presubmit successful).