Simplify local path resolution in fileBrowserPrivate API implementation (part 1).

Simplify local path resolution in fileBrowserPrivate API implementation (part 1).

FileBrowserFunction::GetLocalPathsOnFileThreadAndRunCallbackOnUIThread()
is used for two purposes. One is to parse file system URL (|file_path| field),
and another is to resolve to the cache file path of Google Drive files (|local_path| field).

The patch aims to separate the former use cases from the latter, before I'll
add one more tweak here for selected path names in "Save as" dialog (see issue 140425).

BUG=163075
TEST=Verify view/zip/copy-from-drive/copy-to-drive/format/mount-zip function works on Files.app.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=170443

[kinaba, 2012-11-29 05:19:23]

+dgozman, could you review this CL?

[kinaba, 2012-11-29 08:53:39]

Oops,
http://build.chromium.org/p/tryserver.chromium/builders/linux_chromeos/builds...
This looks to be a real failure. Looking...

[kinaba, 2012-11-30 03:53:52]

Fixed the test failure, now it should be ready for reviewing.
Can you have a look? (sorry for spamming!)

[dgozman, 2012-11-30 09:46:35]

LGTM

Very nice refactoring!

[commit-bot: I haz the power, 2012-11-30 10:17:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/kinaba@chromium.org/11414222/1003

[commit-bot: I haz the power, 2012-11-30 11:55:34]

Retried try job too often on linux_rel for step(s) content_unittests

[commit-bot: I haz the power, 2012-11-30 12:48:47]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/kinaba@chromium.org/11414222/1003

[commit-bot: I haz the power, 2012-11-30 12:58:23]

Change committed as 170443