Move ServiceWorker public headers to public/*/modules/serviceworker (1.5/3)

Move ServiceWorker public headers to public/*/modules/serviceworker (1.5/3)

The change was supposed to be made in three-sided patch:
[1] (blink) https://codereview.chromium.org/1262943002/
[2] (chromium) https://codereview.chromium.org/1254023006/
[3] (blink) https://codereview.chromium.org/1262603004/

But the change [1] needed to duplicate one header file (rather than
having a forwarding include) and a changes made between [1] and [2]
wasn't copied to the dup'ed file.

This change's making the same change made in the old location
to the new location.

I also added a FIXME comment so that we could keep the files in sync
until we land [2].

BUG=453032
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=200774

[kinuko, 2015-08-18 11:59:10]

kinuko@chromium.org changed reviewers:
+ tkent@chromium.org

[kinuko, 2015-08-18 12:00:11]

Kent-san, could you review this? (Feeling bad for bringing this confusion, this
should be cleaned up after landing [2] and [3])

[tkent, 2015-08-19 00:04:21]

On 2015/08/18 12:00:11, kinuko wrote:
> the change [1] needed to duplicate one header file (rather than
> having a forwarding include)

Why did you need to duplicate it?

lgtm anyway.

[kinuko, 2015-08-19 00:09:05]

On 2015/08/19 00:04:21, tkent wrote:
> On 2015/08/18 12:00:11, kinuko wrote:
> > the change [1] needed to duplicate one header file (rather than
> > having a forwarding include)
> 
> Why did you need to duplicate it?

Somehow couldn't work around include breakages with some relative paths. (Will
follow up when I have more)

> lgtm anyway.

[kinuko, 2015-08-19 00:09:12]

The CQ bit was checked by kinuko@chromium.org

[commit-bot: I haz the power, 2015-08-19 00:09:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1294803005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1294803005/1

[commit-bot: I haz the power, 2015-08-19 00:21:14]

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

[commit-bot: I haz the power, 2015-08-19 00:21:14]

Try jobs failed on following builders:
  android_chromium_gn_compile_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)

[kinuko (google), 2015-08-19 00:33:49]

The CQ bit was checked by kinuko@google.com

[commit-bot: I haz the power, 2015-08-19 00:34:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1294803005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1294803005/1

[commit-bot: I haz the power, 2015-08-19 01:05:37]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=200774