Add logic to save input method preference based on user clicks.

Add logic to save input method preference based on user clicks. 

Along the way, add some sanity check code in language_options_list.js 
to filter bad language codes, just in case. 

TEST=manually 
BUG=chromium-os:4573
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=53915

[satorux1, 2010-07-28 00:27:49]

Friendly reminder just in case you missed it.

[arv (Not doing code reviews), 2010-07-28 06:19:26]

I did miss it :'(

LGTM, just a few nits

http://codereview.chromium.org/3051013/diff/1/3
File chrome/browser/resources/options/chromeos_language_options.js (right):

http://codereview.chromium.org/3051013/diff/1/3#newcode149
chrome/browser/resources/options/chromeos_language_options.js:149: * engines
preference.
@private

http://codereview.chromium.org/3051013/diff/1/3#newcode162
chrome/browser/resources/options/chromeos_language_options.js:162:
checkboxes[i].checked = true;
checkboxes[i].checked = checkboxes[i].inputMethodId in dictionary;

[satorux1, 2010-07-28 06:31:19]

Thanks! Will submit shortly.

http://codereview.chromium.org/3051013/diff/1/3
File chrome/browser/resources/options/chromeos_language_options.js (right):

http://codereview.chromium.org/3051013/diff/1/3#newcode149
chrome/browser/resources/options/chromeos_language_options.js:149: * engines
preference.
On 2010/07/28 06:19:27, arv wrote:
> @private

Done.

http://codereview.chromium.org/3051013/diff/1/3#newcode162
chrome/browser/resources/options/chromeos_language_options.js:162:
checkboxes[i].checked = true;
On 2010/07/28 06:19:27, arv wrote:
> checkboxes[i].checked = checkboxes[i].inputMethodId in dictionary;

Done.

http://codereview.chromium.org/3051013/diff/1/3#newcode171
chrome/browser/resources/options/chromeos_language_options.js:171: * input
method list.
Added @private here as well.