Make is_ktx safer

Make is_ktx safer

Rather than assuming the data passed to ktx at least
KTX_FILE_IDENTIFIER_SIZE, pass the length of the data to is_ktx and
compare it.

Splitting off from crrev.com/1862133002, which no longer depends on
is_ktx.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1882593002

Committed: https://skia.googlesource.com/skia/+/b8e0960de41be52b3e6c85f08fdc722925c70941

[scroggo_chromium, 2016-04-12 13:58:43]

Description was changed from

==========
Make is_ktx safer

Rather than assuming the data passed to ktx at least
KTX_FILE_IDENTIFIER_SIZE, pass the length of the data to is_ktx and
compare it.

Splitting off from crrev.com/1862133002, which no longer depends on
is_ktx.
==========

to

==========
Make is_ktx safer

Rather than assuming the data passed to ktx at least
KTX_FILE_IDENTIFIER_SIZE, pass the length of the data to is_ktx and
compare it.

Splitting off from crrev.com/1862133002, which no longer depends on
is_ktx.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[scroggo_chromium, 2016-04-12 14:00:38]

scroggo@chromium.org changed reviewers:
+ robertphillips@google.com

[robertphillips, 2016-04-12 14:12:09]

lgtm

[scroggo, 2016-04-12 14:31:23]

The CQ bit was checked by scroggo@google.com

[commit-bot: I haz the power, 2016-04-12 14:31:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1882593002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1882593002/1

[commit-bot: I haz the power, 2016-04-12 14:41:24]

Description was changed from

==========
Make is_ktx safer

Rather than assuming the data passed to ktx at least
KTX_FILE_IDENTIFIER_SIZE, pass the length of the data to is_ktx and
compare it.

Splitting off from crrev.com/1862133002, which no longer depends on
is_ktx.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Make is_ktx safer

Rather than assuming the data passed to ktx at least
KTX_FILE_IDENTIFIER_SIZE, pass the length of the data to is_ktx and
compare it.

Splitting off from crrev.com/1862133002, which no longer depends on
is_ktx.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/b8e0960de41be52b3e6c85f08fdc722925c70941
==========

[commit-bot: I haz the power, 2016-04-12 14:41:25]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/b8e0960de41be52b3e6c85f08fdc722925c70941