Remove ExecutionContextTask subclasses from DOMFileSystem

Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the null check of |callback| in scheduleCallback(),
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to
  - call createSameThreadTask() and do null check of callback, or
  - call reportError() instead.

BUG=478194
Committed: https://crrev.com/a8a5e89eb2f7d8f4a6a12b8e8ab28ba7a54dcc35
Cr-Commit-Position: refs/heads/master@{#402129}

[hiroshige, 2016-06-26 10:17:16]

The CQ bit was checked by hiroshige@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-06-26 10:17:22]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[hiroshige, 2016-06-26 10:24:32]

Description was changed from

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

BUG=
==========

to

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to call createSameThreadTask() or
  reportError() instead.

BUG=478194
==========

[hiroshige, 2016-06-26 10:27:08]

Description was changed from

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to call createSameThreadTask() or
  reportError() instead.

BUG=478194
==========

to

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the null check of |callback| in scheduleCallback(),
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to
  - call createSameThreadTask() and do null check of callback, or
  - call reportError() instead.

BUG=478194
==========

[hiroshige, 2016-06-26 10:28:02]

hiroshige@chromium.org changed reviewers:
+ tzik@chromium.org

[hiroshige, 2016-06-26 10:28:03]

tzik@, could you take a look as a modules/filesystem OWNER?

[commit-bot: I haz the power, 2016-06-26 11:34:29]

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

[commit-bot: I haz the power, 2016-06-26 11:34:30]

Dry run: This issue passed the CQ dry run.

[tzik, 2016-06-26 15:47:55]

lgtm

[haraken, 2016-06-27 01:12:33]

LGTM, nice refactoring!

[hiroshige, 2016-06-27 07:18:02]

The CQ bit was checked by hiroshige@chromium.org

[commit-bot: I haz the power, 2016-06-27 07:18:18]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-06-27 07:21:24]

Description was changed from

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the null check of |callback| in scheduleCallback(),
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to
  - call createSameThreadTask() and do null check of callback, or
  - call reportError() instead.

BUG=478194
==========

to

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the null check of |callback| in scheduleCallback(),
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to
  - call createSameThreadTask() and do null check of callback, or
  - call reportError() instead.

BUG=478194
==========

[commit-bot: I haz the power, 2016-06-27 07:21:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-27 07:22:44]

Description was changed from

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the null check of |callback| in scheduleCallback(),
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to
  - call createSameThreadTask() and do null check of callback, or
  - call reportError() instead.

BUG=478194
==========

to

==========
Remove ExecutionContextTask subclasses from DOMFileSystem

This CL
- makes scheduleCallback() to have SameThreadTask as an argument,
- removes the null check of |callback| in scheduleCallback(),
- removes the arguments handling codes and ExecutionContextTask subclasses
  around scheduleCallback(), and
- makes the callsites of scheduleCallback() to
  - call createSameThreadTask() and do null check of callback, or
  - call reportError() instead.

BUG=478194

Committed: https://crrev.com/a8a5e89eb2f7d8f4a6a12b8e8ab28ba7a54dcc35
Cr-Commit-Position: refs/heads/master@{#402129}
==========

[commit-bot: I haz the power, 2016-06-27 07:22:45]

Patchset 1 (id:??) landed as
https://crrev.com/a8a5e89eb2f7d8f4a6a12b8e8ab28ba7a54dcc35
Cr-Commit-Position: refs/heads/master@{#402129}