Restrict SW Renderer clear to scissor

Restrict SW Renderer clear to scissor

The refactoring in crrev.com/2867913002 did not correctly handle cases
where we cleared with a scissor active. This change ensures that the
clear only applies to the scissored pixels.

Bug: 729363
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I1be4e55b112ddf3291c1883fccf1084dc0c90f79
Reviewed-on: https://chromium-review.googlesource.com/526301
Reviewed-by: enne <enne@chromium.org>;
Commit-Queue: Eric Karl <ericrk@chromium.org>;
Cr-Original-Commit-Position: refs/heads/master@{#477453}
Review-Url: https://codereview.chromium.org/2926403002 .
Cr-Commit-Position: refs/branch-heads/3112@{#269}
Cr-Branched-From: b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed: https://chromium.googlesource.com/chromium/src/+/2ac3185caec2f97ef777b48f6b54dd83d58157a4

[ericrk, 2017-06-08 21:44:23]

Description was changed from

==========
Restrict SW Renderer clear to scissor

The refactoring in crrev.com/2867913002 did not correctly handle cases
where we cleared with a scissor active. This change ensures that the
clear only applies to the scissored pixels.

Bug: 729363
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I1be4e55b112ddf3291c1883fccf1084dc0c90f79
Reviewed-on: https://chromium-review.googlesource.com/526301
Reviewed-by: enne <enne@chromium.org>
Commit-Queue: Eric Karl <ericrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#477453}
(cherry picked from commit 98c422c7b0b81c19765850453c761a074d242a03)
==========

to

==========
Restrict SW Renderer clear to scissor

The refactoring in crrev.com/2867913002 did not correctly handle cases
where we cleared with a scissor active. This change ensures that the
clear only applies to the scissored pixels.

Bug: 729363
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I1be4e55b112ddf3291c1883fccf1084dc0c90f79
Reviewed-on: https://chromium-review.googlesource.com/526301
Reviewed-by: enne <enne@chromium.org>
Commit-Queue: Eric Karl <ericrk@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#477453}
Review-Url: https://codereview.chromium.org/2926403002 .
Cr-Commit-Position: refs/branch-heads/3112@{#269}
Cr-Branched-From:
b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed:
https://chromium.googlesource.com/chromium/src/+/2ac3185caec2f97ef777b48f6b54...
==========

[ericrk, 2017-06-08 21:44:25]

Committed patchset #1 (id:1) manually as
2ac3185caec2f97ef777b48f6b54dd83d58157a4.