Remove IndexedDBDispatcher::init_params()

Remove IndexedDBDispatcher::init_params()

It came up during a code review (involving refactoring IDMap, which this function uses) that this function appears to be unused:
https://codereview.chromium.org/2480293004/diff/120001/content/child/indexed_db/indexed_db_dispatcher.h#newcode133

BUG=

[rlanday, 2016-11-18 20:52:19]

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

[commit-bot: I haz the power, 2016-11-18 20:53:32]

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

[rlanday, 2016-11-18 21:03:14]

rlanday@chromium.org changed reviewers:
+ cmumford@chromium.org

[danakj, 2016-11-18 22:25:24]

danakj@chromium.org changed reviewers:
+ danakj@chromium.org

[danakj, 2016-11-18 22:25:25]

LGTM

[commit-bot: I haz the power, 2016-11-18 22:27:06]

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

[commit-bot: I haz the power, 2016-11-18 22:27:07]

Dry run: This issue passed the CQ dry run.

[rlanday, 2016-11-18 23:20:07]

The CQ bit was checked by rlanday@chromium.org

[commit-bot: I haz the power, 2016-11-18 23:21:10]

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, 2016-11-18 23:55:07]

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

[commit-bot: I haz the power, 2016-11-18 23:55:08]

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

[rlanday, 2016-11-21 17:38:04]

rlanday@chromium.org changed required reviewers:
+ cmumford@chromium.org

[rlanday, 2016-11-21 17:41:01]

Looks like I need cmumford's review before it will let me land this

[cmumford, 2016-11-22 17:39:58]

lgtm

[rlanday, 2016-11-22 18:27:55]

The CQ bit was checked by rlanday@chromium.org

[commit-bot: I haz the power, 2016-11-22 18:28:13]

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, 2016-11-22 19:00:21]

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

[commit-bot: I haz the power, 2016-11-22 19:00:22]

Try jobs failed on following builders:
  android_compile_dbg on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_comp...)

[rlanday, 2016-11-22 20:49:05]

The CQ bit was checked by rlanday@chromium.org

[commit-bot: I haz the power, 2016-11-22 20:49:41]

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, 2016-11-22 20:56:01]

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

[commit-bot: I haz the power, 2016-11-22 20:56:03]

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

[rlanday, 2016-11-22 22:52:32]

On 2016/11/22 at 20:56:03, commit-bot wrote:
> Try jobs failed on following builders:
>   chromium_presubmit on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

Looks like this change was already made in
https://codereview.chromium.org/2500263003 before I could land this :)