IndexedDB: Added IDBObjectStore.getAll() corruption test.

IndexedDB: Added IDBObjectStore.getAll() corruption test.

This test would have been part of http://crrev.com/1074493002, but incorrect
error handling in IndexedDBBackingStore prevented this test from passing.

Test was failing because ObjectStoreCursorImpl::LoadCurrentRow() called
IndexedDBBackingStore::Transaction::GetBlobInfoForRecord(), but didn't pass
up its leveldb::Status making it indistinguishable from having a stale
index - so the caller to IndexedDBBackingStore::Cursor::Continue didn't know
that a "real" error occurred.

BUG=457450
Committed: https://crrev.com/5d76fdd16ea4a35ebbe08027107676c20b3a0957
Cr-Commit-Position: refs/heads/master@{#332435}

[jsbell, 2015-05-04 23:39:21]

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

[jsbell, 2015-05-04 23:39:21]

lgtm

[cmumford, 2015-05-15 21:40:49]

The CQ bit was checked by cmumford@chromium.org

[commit-bot: I haz the power, 2015-05-15 21:42:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1116253003/1

[commit-bot: I haz the power, 2015-05-15 22:39:58]

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

[commit-bot: I haz the power, 2015-05-15 22:39:59]

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

[cmumford, 2015-05-19 19:05:34]

The CQ bit was checked by cmumford@chromium.org

[commit-bot: I haz the power, 2015-05-19 19:06:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1116253003/1

[commit-bot: I haz the power, 2015-05-19 20:18:47]

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

[commit-bot: I haz the power, 2015-05-19 20:18:48]

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

[cmumford, 2015-06-02 17:04:41]

The CQ bit was checked by cmumford@chromium.org

[commit-bot: I haz the power, 2015-06-02 17:05:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1116253003/1

[commit-bot: I haz the power, 2015-06-02 18:41:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-02 18:42:06]

Patchset 1 (id:??) landed as
https://crrev.com/5d76fdd16ea4a35ebbe08027107676c20b3a0957
Cr-Commit-Position: refs/heads/master@{#332435}