Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior for the attributes (default values are assigned for null assignment):

CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly.

BUG=497307
Committed: https://crrev.com/12c12ffc8aa18319bb57c209ddfa7eb58cb56caa
Cr-Commit-Position: refs/heads/master@{#358021}

[tanay.c, 2015-11-05 08:51:52]

tanay.c@samsung.com changed reviewers:
+ mkwst@chromium.org, philipj@opera.com

[tanay.c, 2015-11-05 08:51:53]

PTAL

[tanay.c, 2015-11-05 08:56:55]

Description was changed from

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

BUG=497307
==========

to

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior 
for the attributes (default values are assigned):
CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly
BUG=497307
==========

[tanay.c, 2015-11-05 08:57:31]

Description was changed from

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior 
for the attributes (default values are assigned):
CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly
BUG=497307
==========

to

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior for the attributes (default
values are assigned for null assignment):
CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly
BUG=497307
==========

[tanay.c, 2015-11-05 08:57:42]

Description was changed from

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior for the attributes (default
values are assigned for null assignment):
CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly
BUG=497307
==========

to

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior for the attributes (default
values are assigned for null assignment):

CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly
BUG=497307
==========

[philipj_slow, 2015-11-05 09:13:05]

Description was changed from

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior for the attributes (default
values are assigned for null assignment):

CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly
BUG=497307
==========

to

==========
Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

This change does not modify the current behavior for the attributes (default
values are assigned for null assignment):

CanvasRenderingContext2D.globalCompositeOperation = null => ' source-over '

CanvasRenderingContext2D.shadowColor = null => 'rgba(0,0,0,0)'

CanvasRenderingContext2D.lineCap = null => 'butt'

CanvasRenderingContext2D.lineJoin = null => 'miter'

Behavior is consistent with Firefox Nightly.

BUG=497307
==========

[philipj_slow, 2015-11-05 09:15:00]

The CQ bit was checked by philipj@opera.com

[philipj_slow, 2015-11-05 09:15:00]

lgtm

I've confirmed that the setters return and do nothing if the value isn't valid,
so no test could be written to distinguish "null" from "".

[commit-bot: I haz the power, 2015-11-05 09:15:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1405963012/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1405963012/1

[commit-bot: I haz the power, 2015-11-05 10:18:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-05 10:18:51]

Patchset 1 (id:??) landed as
https://crrev.com/12c12ffc8aa18319bb57c209ddfa7eb58cb56caa
Cr-Commit-Position: refs/heads/master@{#358021}