DM: remove unnecessary use of std::function

DM: remove unnecessary use of std::function

This draw_to_canvas() function doesn't need the power of std::function.

This skips a copy or two, which is nice, and seems to clear
up most of my MSAN problems.  Why?  I do not know.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1718633002

CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-MSAN-Trybot

Committed: https://skia.googlesource.com/skia/+/cbf897802b41d61dc35d6db0552d8d9604945fdc

[mtklein_C, 2016-02-19 20:19:05]

Description was changed from

==========
DM: remove unnecessary use of std::function

This draw_to_canvas() function doesn't need the power of std::function.

This skips a copy or two, which is nice, and seems to clear
up most of my MSAN problems.  Why?  I do not know.

BUG=skia:
==========

to

==========
DM: remove unnecessary use of std::function

This draw_to_canvas() function doesn't need the power of std::function.

This skips a copy or two, which is nice, and seems to clear
up most of my MSAN problems.  Why?  I do not know.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[mtklein_C, 2016-02-19 20:20:39]

Description was changed from

==========
DM: remove unnecessary use of std::function

This draw_to_canvas() function doesn't need the power of std::function.

This skips a copy or two, which is nice, and seems to clear
up most of my MSAN problems.  Why?  I do not know.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
DM: remove unnecessary use of std::function

This draw_to_canvas() function doesn't need the power of std::function.

This skips a copy or two, which is nice, and seems to clear
up most of my MSAN problems.  Why?  I do not know.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-MSAN-Trybot
==========

[mtklein_C, 2016-02-19 21:16:10]

mtklein@chromium.org changed reviewers:
+ bungeman@google.com

[mtklein_C, 2016-02-19 21:16:10]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2016-02-19 21:16:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1718633002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1718633002/20001

[commit-bot: I haz the power, 2016-02-19 21:16:16]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2016-02-20 03:16 UTC

[bungeman-skia, 2016-02-19 21:18:29]

lgtm

[commit-bot: I haz the power, 2016-02-19 22:27:16]

Description was changed from

==========
DM: remove unnecessary use of std::function

This draw_to_canvas() function doesn't need the power of std::function.

This skips a copy or two, which is nice, and seems to clear
up most of my MSAN problems.  Why?  I do not know.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-MSAN-Trybot
==========

to

==========
DM: remove unnecessary use of std::function

This draw_to_canvas() function doesn't need the power of std::function.

This skips a copy or two, which is nice, and seems to clear
up most of my MSAN problems.  Why?  I do not know.

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-MSAN-Trybot

Committed:
https://skia.googlesource.com/skia/+/cbf897802b41d61dc35d6db0552d8d9604945fdc
==========

[commit-bot: I haz the power, 2016-02-19 22:27:17]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/cbf897802b41d61dc35d6db0552d8d9604945fdc