IndexedDB: Avoid side effects for array key conversion w/ HasOwnProperty

IndexedDB: Avoid side effects for array key conversion w/ HasOwnProperty

When converting arrays to keys, only own properties should be
considered, much like clones. Otherwise, this opens up the behavior to
side effects via getters on the Object/Array prototype even if the
value being converted to a key is a clone.

BUG=641101
R=haraken@chromium.org

Review-Url: https://codereview.chromium.org/2279343002
Cr-Commit-Position: refs/heads/master@{#415172}
(cherry picked from commit 0438433a38d4e54190dadf356bd74ce76065a684)

Committed: https://chromium.googlesource.com/chromium/src/+/99b38ec79374b0cb01ebd6801f9fdb56686bde6b

[jsbell, 2016-09-12 16:30:35]

Description was changed from

==========
IndexedDB: Avoid side effects for array key conversion w/ HasOwnProperty

When converting arrays to keys, only own properties should be
considered, much like clones. Otherwise, this opens up the behavior to
side effects via getters on the Object/Array prototype even if the
value being converted to a key is a clone.

BUG=641101
R=haraken@chromium.org

Review-Url: https://codereview.chromium.org/2279343002
Cr-Commit-Position: refs/heads/master@{#415172}
(cherry picked from commit 0438433a38d4e54190dadf356bd74ce76065a684)
==========

to

==========
IndexedDB: Avoid side effects for array key conversion w/ HasOwnProperty

When converting arrays to keys, only own properties should be
considered, much like clones. Otherwise, this opens up the behavior to
side effects via getters on the Object/Array prototype even if the
value being converted to a key is a clone.

BUG=641101
R=haraken@chromium.org

Review-Url: https://codereview.chromium.org/2279343002
Cr-Commit-Position: refs/heads/master@{#415172}
(cherry picked from commit 0438433a38d4e54190dadf356bd74ce76065a684)

Committed:
https://chromium.googlesource.com/chromium/src/+/99b38ec79374b0cb01ebd6801f9f...
==========

[jsbell, 2016-09-12 16:30:36]

Committed patchset #1 (id:1) manually as
99b38ec79374b0cb01ebd6801f9fdb56686bde6b.