IndexedDB: Implementation of IDBObjectStore.getAllKeys().

IndexedDB: Implementation of IDBObjectStore.getAllKeys().

An experimental web platform feature described in the draft spec.:
https://w3c.github.io/IndexedDB/#widl-IDBObjectStore-getAllKeys-IDBRequest-any-query-unsigned-long-count

Accessible via the enable-experimental-web-platform-features flag.

Part 1 of 2

BUG=492433
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196353

[cmumford, 2015-05-29 00:23:03]

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

[jsbell, 2015-05-29 00:31:20]

lgtm

[cmumford, 2015-06-02 13:38:09]

The CQ bit was checked by cmumford@chromium.org

[commit-bot: I haz the power, 2015-06-02 13:38:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1164493003/1

[commit-bot: I haz the power, 2015-06-02 14:54:27]

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

[commit-bot: I haz the power, 2015-06-02 14:54:27]

Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/6...)

[cmumford, 2015-06-02 22:25:46]

The CQ bit was checked by cmumford@chromium.org

[commit-bot: I haz the power, 2015-06-02 22:26:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1164493003/1

[commit-bot: I haz the power, 2015-06-02 23:13:21]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196353