Make CrOS file manager determine .tar.gz/.tar.bz2 file type properly.

Make CrOS file manager determine .tar.gz/.tar.bz2 file type properly.

This CL modifies the FileType.getType function in the CrOS file manager
extension to use RegExp patterns to check for the type of a given file
URI, such that it determines .tar.bz and .tar.bz2 properly.

BUG=chromium-os:26952
TEST=Tested the following:
1. Verify that CrOS file manager correctly shows all the file types
   listed in FileType.types.
2. Use the built-in JavaScript profiler to profile FileType.getType
   with 1000 .html files (the last entry in FileType.types), and
   make sure that there is no noticable slowdown in FileType.getType.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=124027

[tbarzic, 2012-02-28 17:35:49]

On 2012/02/27 23:18:00, Ben Chan wrote:

lgtm

[commit-bot: I haz the power, 2012-02-28 17:59:02]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/benchan@chromium.org/9478014/1

[commit-bot: I haz the power, 2012-02-28 17:59:04]

Presubmit check for 9478014-1 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Missing LGTM from an OWNER for:
chrome/browser/resources/file_manager/js/file_type.js

[rginda, 2012-02-28 18:03:26]

lgtm

[commit-bot: I haz the power, 2012-02-28 18:08:14]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/benchan@chromium.org/9478014/1

[commit-bot: I haz the power, 2012-02-28 21:36:05]

Change committed as 124027