Fixes issue 1228: support for innerText and textContent to domita.js

http://code.google.com/p/google-caja/issues/detail?id=1228

Adds to domita.js handlers setters and getters for textContent and
innerText for TameTextNode and TameElement.


Submitted @4229

[Jasvir, 2010-08-07 00:52:43]

http://codereview.appspot.com/1689062/diff/1/3
File tests/com/google/caja/plugin/domita_test_untrusted.html (right):

http://codereview.appspot.com/1689062/diff/1/3#newcode3296
tests/com/google/caja/plugin/domita_test_untrusted.html:3296:
testInnerTextNode.innerText = '';
What should innerText be if el.innerHtml is set to something that gets stripped
- for example, script/style tags.  Please add test case innerHTML set followed
by innerText read.

[MikeSamuel, 2010-08-07 01:12:52]

http://codereview.appspot.com/1689062/diff/1/3
File tests/com/google/caja/plugin/domita_test_untrusted.html (right):

http://codereview.appspot.com/1689062/diff/1/3#newcode3296
tests/com/google/caja/plugin/domita_test_untrusted.html:3296:
testInnerTextNode.innerText = '';
On 2010/08/07 00:52:43, jasvir wrote:
> What should innerText be if el.innerHtml is set to something that gets
stripped
> - for example, script/style tags.  Please add test case innerHTML set followed
> by innerText read.

The opaque nodes test already shows that the text content of opaque nodes are
stripped out.

[Jasvir, 2010-08-07 02:02:46]

LGTM