Add support for log file rotation.

Add support for log file rotation.
Clean up error logging (more consistent formatting).
Log stack traces.
Ensure most substantial Promise chains used in importer code have catch clause hooked up to logger.

BUG=460614
BUG=449034
TEST=browser_test: FileManagerJsTest.*

Committed: https://crrev.com/4b600b552c6a611827539237270ce3f5eea17999
Cr-Commit-Position: refs/heads/master@{#317547}

[Steve McKay, 2015-02-20 22:57:43]

smckay@chromium.org changed reviewers:
+ fukino@chromium.org

[Steve McKay, 2015-02-21 17:46:38]

Simplify rotation logic. Delete the next log if it exists at time of rotation.

[fukino, 2015-02-23 03:42:26]

Thank you! lgtm wit a nit :)

https://codereview.chromium.org/945933003/diff/40001/ui/file_manager/file_man...
File ui/file_manager/file_manager/common/js/importer_common.js (right):

https://codereview.chromium.org/945933003/diff/40001/ui/file_manager/file_man...
ui/file_manager/file_manager/common/js/importer_common.js:785: * This function
must be run befor instantiating the logger.
nit: s/befor/before

[Steve McKay, 2015-02-23 03:47:30]

New patchsets have been uploaded after l-g-t-m from fukino@chromium.org

[Steve McKay, 2015-02-23 03:47:31]

Respond to review comments.

[Steve McKay, 2015-02-23 03:50:19]

Dones. Thanks!

https://codereview.chromium.org/945933003/diff/40001/ui/file_manager/file_man...
File ui/file_manager/file_manager/common/js/importer_common.js (right):

https://codereview.chromium.org/945933003/diff/40001/ui/file_manager/file_man...
ui/file_manager/file_manager/common/js/importer_common.js:785: * This function
must be run befor instantiating the logger.
On 2015/02/23 03:42:26, fukino wrote:
> nit: s/befor/before

Done.

[Steve McKay, 2015-02-23 03:50:25]

The CQ bit was checked by smckay@chromium.org

[commit-bot: I haz the power, 2015-02-23 03:51:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/945933003/60001

[commit-bot: I haz the power, 2015-02-23 03:53:44]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-23 03:53:45]

Try jobs failed on following builders:
  ios_dbg_simulator on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)

[Steve McKay, 2015-02-23 04:19:02]

Merge w/ master.

[Steve McKay, 2015-02-23 04:19:23]

The CQ bit was checked by smckay@chromium.org

[commit-bot: I haz the power, 2015-02-23 04:20:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/945933003/80001

[commit-bot: I haz the power, 2015-02-23 04:22:52]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-23 04:22:53]

Try jobs failed on following builders:
  ios_dbg_simulator on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)

[Steve McKay, 2015-02-23 05:33:24]

The CQ bit was checked by smckay@chromium.org

[commit-bot: I haz the power, 2015-02-23 05:33:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/945933003/80001

[commit-bot: I haz the power, 2015-02-23 05:46:27]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2015-02-23 05:47:11]

Patchset 5 (id:??) landed as
https://crrev.com/4b600b552c6a611827539237270ce3f5eea17999
Cr-Commit-Position: refs/heads/master@{#317547}