Clear the scaled bitmap before drawing into it for huge UIResources.

Clear the scaled bitmap before drawing into it for huge UIResources.

When the UIResource is larger than max_texture_size, we downsample it
into a smaller bitmap. However floating point precision can cause some
of the pixels to not be fully initialized if the scale doesn't exactly
cause the bitmap to be filled. So clear the bitmap before doing this
scaling operation into it.

R=enne
BUG=642011
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Committed: https://crrev.com/8d737f8882e170b93ec3224642fa7f6a552817f3
Cr-Commit-Position: refs/heads/master@{#415124}

[danakj, 2016-08-29 20:55:11]

Description was changed from

==========
Clear the scaled bitmap before drawing into it for huge UIResources.

When the UIResource is larger than max_texture_size, we downsample it
into a smaller bitmap. However floating point precision can cause some
of the pixels to not be fully initialized if the scale doesn't exactly
cause the bitmap to be filled. So clear the bitmap before doing this
scaling operation into it.

R=enne
BUG=642011
==========

to

==========
Clear the scaled bitmap before drawing into it for huge UIResources.

When the UIResource is larger than max_texture_size, we downsample it
into a smaller bitmap. However floating point precision can cause some
of the pixels to not be fully initialized if the scale doesn't exactly
cause the bitmap to be filled. So clear the bitmap before doing this
scaling operation into it.

R=enne
BUG=642011
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
==========

[danakj, 2016-08-29 20:55:14]

The CQ bit was checked by danakj@chromium.org to run a CQ dry run

[danakj, 2016-08-29 20:58:45]

The CQ bit was checked by danakj@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-29 21:29:18]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[danakj, 2016-08-30 00:43:23]

The CQ bit was unchecked by danakj@chromium.org

[enne (OOO), 2016-08-30 00:43:45]

lgtm

[danakj, 2016-08-30 00:44:00]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2016-08-30 02:16:45]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-30 04:57:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-30 05:00:19]

Description was changed from

==========
Clear the scaled bitmap before drawing into it for huge UIResources.

When the UIResource is larger than max_texture_size, we downsample it
into a smaller bitmap. However floating point precision can cause some
of the pixels to not be fully initialized if the scale doesn't exactly
cause the bitmap to be filled. So clear the bitmap before doing this
scaling operation into it.

R=enne
BUG=642011
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
==========

to

==========
Clear the scaled bitmap before drawing into it for huge UIResources.

When the UIResource is larger than max_texture_size, we downsample it
into a smaller bitmap. However floating point precision can cause some
of the pixels to not be fully initialized if the scale doesn't exactly
cause the bitmap to be filled. So clear the bitmap before doing this
scaling operation into it.

R=enne
BUG=642011
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Committed: https://crrev.com/8d737f8882e170b93ec3224642fa7f6a552817f3
Cr-Commit-Position: refs/heads/master@{#415124}
==========

[commit-bot: I haz the power, 2016-08-30 05:00:20]

Patchset 2 (id:??) landed as
https://crrev.com/8d737f8882e170b93ec3224642fa7f6a552817f3
Cr-Commit-Position: refs/heads/master@{#415124}