Make LinearSrcOverBench not crash in constructor when resource path is missing

Make LinearSrcOverBench not crash in constructor when resource path is missing
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=1998113003

Committed: https://skia.googlesource.com/skia/+/809f2586707071efee1164f17b6e1ffd636cce26

[bsalomon, 2016-05-20 15:22:37]

Description was changed from

==========
Make LinearSrcOverBench not crash in constructor when resource path is missing
==========

to

==========
Make LinearSrcOverBench not crash in constructor when resource path is missing
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=1998113003
==========

[bsalomon, 2016-05-20 15:29:40]

Patchset #1 (id:1) has been deleted

[bsalomon, 2016-05-20 15:29:46]

Patchset #1 (id:20001) has been deleted

[bsalomon, 2016-05-20 15:31:12]

bsalomon@google.com changed reviewers:
+ herb@google.com

[bsalomon, 2016-05-20 15:31:12]

All the registered benches are constructed when the program begins. So even when
running with parameters that wouldn't trigger this benchmark to run we will wind
up spending time loading the image and crash if it isn't present.

[bsalomon, 2016-05-20 15:31:18]

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

[commit-bot: I haz the power, 2016-05-20 15:31:20]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1998113003/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1998113003/40001

[herb_g, 2016-05-20 15:36:41]

lgtm

[commit-bot: I haz the power, 2016-05-20 15:52:51]

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

[commit-bot: I haz the power, 2016-05-20 15:52:52]

Dry run: This issue passed the CQ dry run.

[bsalomon, 2016-05-20 15:53:23]

The CQ bit was checked by bsalomon@google.com

[commit-bot: I haz the power, 2016-05-20 15:53:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1998113003/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1998113003/40001

[commit-bot: I haz the power, 2016-05-20 15:54:26]

Description was changed from

==========
Make LinearSrcOverBench not crash in constructor when resource path is missing
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=1998113003
==========

to

==========
Make LinearSrcOverBench not crash in constructor when resource path is missing
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=1998113003

Committed:
https://skia.googlesource.com/skia/+/809f2586707071efee1164f17b6e1ffd636cce26
==========

[commit-bot: I haz the power, 2016-05-20 15:54:27]

Committed patchset #1 (id:40001) as
https://skia.googlesource.com/skia/+/809f2586707071efee1164f17b6e1ffd636cce26