Make SkROBuffer::Iter::size() work when exhausted

Make SkROBuffer::Iter::size() work when exhausted

According to the documentation, this method will return 0 when the Iter
is exhausted. Prior to this CL, it crashes instead.

Prevent a crash with a null fHead, and add a test to verify the
behavior.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1574603002

Committed: https://skia.googlesource.com/skia/+/b512aaa5c808bcb1336c147682657882ee54e652

[scroggo, 2016-01-08 22:31:11]

Description was changed from

==========
Make SkROBuffer::Iter::size() work when exhausted

According to the documentation, this method will return 0 when the Iter
is exhausted. Prior to this CL, it crashes instead.

Prevent a crash with a null fHead, and add a test to verify the
behavior.
==========

to

==========
Make SkROBuffer::Iter::size() work when exhausted

According to the documentation, this method will return 0 when the Iter
is exhausted. Prior to this CL, it crashes instead.

Prevent a crash with a null fHead, and add a test to verify the
behavior.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[scroggo, 2016-01-08 22:31:41]

scroggo@google.com changed reviewers:
+ reed@google.com

[scroggo, 2016-01-08 22:31:45]

The CQ bit was checked by scroggo@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-01-08 22:31:51]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1574603002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1574603002/1

[commit-bot: I haz the power, 2016-01-08 22:53:28]

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

[commit-bot: I haz the power, 2016-01-08 22:53:29]

Dry run: This issue passed the CQ dry run.

[reed1, 2016-01-09 01:11:45]

lgtm

[scroggo, 2016-01-11 14:20:15]

The CQ bit was checked by scroggo@google.com

[commit-bot: I haz the power, 2016-01-11 14:20:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1574603002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1574603002/1

[commit-bot: I haz the power, 2016-01-11 14:38:02]

Description was changed from

==========
Make SkROBuffer::Iter::size() work when exhausted

According to the documentation, this method will return 0 when the Iter
is exhausted. Prior to this CL, it crashes instead.

Prevent a crash with a null fHead, and add a test to verify the
behavior.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Make SkROBuffer::Iter::size() work when exhausted

According to the documentation, this method will return 0 when the Iter
is exhausted. Prior to this CL, it crashes instead.

Prevent a crash with a null fHead, and add a test to verify the
behavior.
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/b512aaa5c808bcb1336c147682657882ee54e652
==========

[commit-bot: I haz the power, 2016-01-11 14:38:02]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/b512aaa5c808bcb1336c147682657882ee54e652