Enable rar, tar, tar.gz and tar.bz2 archive support in CrOS file manager.

Enable rar, tar, tar.gz and tar.bz2 archive support in CrOS file manager.

This CL makes the following changes:
1. Change the CrOS file manager extension to handle rar, tar, tar.gz,
   tgz, tar.bz2, tbz, and tbz2 files in the same way that zip files are
   handled, so that they can be mounted as a virtual filesystem and expose
   their contents via the file manager.
2. Rename the 'Open zip file' button to 'Open'.
3. Remove unused IDS_FILE_BROWSER_UNMOUNT_ARCHIVE and ARCHIVES_REGEXP
   from code.

BUG=chromium-os:26764
TEST=Build chromeos and test opening supported archive formats via file manager.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=123315

[tbarzic, 2012-02-23 05:51:55]

On 2012/02/23 05:31:52, Ben Chan wrote:

LGTM, 
but you'll also need owner lgtms for chrome/browser/extensions and
chrome/browser/resources/file_manager

[Ben Chan, 2012-02-23 06:00:02]

+rginda and +asargent

[rginda, 2012-02-23 18:32:30]

On 2012/02/23 06:00:02, Ben Chan wrote:
> +rginda and +asargent

lgtm

[commit-bot: I haz the power, 2012-02-23 18:44:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/benchan@chromium.org/9452007/3001

[commit-bot: I haz the power, 2012-02-23 20:45:46]

Change committed as 123315