Allows inline style in User-Agent shadow trees under CSP

Allows inline style in User-Agent shadow trees under CSP

When a page specifies a CSP of style-src 'self', it does not allow inline style
changes. However, the node under User-Agent shadow trees should be an exception
as developers are not allowed to modify the inline-style, but blink may need
it. So we add shadow dom elements as an exception under CSP.

BUG=648589
Review-Url: https://codereview.chromium.org/2359813002
Cr-Commit-Position: refs/heads/master@{#420456}
(cherry picked from commit bf99fb1ccc22a6b037045f6174d8a113d97f1ef7)

Committed: https://chromium.googlesource.com/chromium/src/+/aa31201e326904bb4fe00014391e936dfab93ecb

[majidvp, 2016-09-26 13:55:09]

Description was changed from

==========
Allows inline style in User-Agent shadow trees under CSP

When a page specifies a CSP of style-src 'self', it does not allow inline style
changes. However, the node under User-Agent shadow trees should be an exception
as developers are not allowed to modify the inline-style, but blink may need
it. So we add shadow dom elements as an exception under CSP.

BUG=648589

Review-Url: https://codereview.chromium.org/2359813002
Cr-Commit-Position: refs/heads/master@{#420456}
(cherry picked from commit bf99fb1ccc22a6b037045f6174d8a113d97f1ef7)
==========

to

==========
Allows inline style in User-Agent shadow trees under CSP

When a page specifies a CSP of style-src 'self', it does not allow inline style
changes. However, the node under User-Agent shadow trees should be an exception
as developers are not allowed to modify the inline-style, but blink may need
it. So we add shadow dom elements as an exception under CSP.

BUG=648589

Review-Url: https://codereview.chromium.org/2359813002
Cr-Commit-Position: refs/heads/master@{#420456}
(cherry picked from commit bf99fb1ccc22a6b037045f6174d8a113d97f1ef7)

Committed:
https://chromium.googlesource.com/chromium/src/+/aa31201e326904bb4fe00014391e...
==========

[majidvp, 2016-09-26 13:55:11]

Committed patchset #1 (id:1) manually as
aa31201e326904bb4fe00014391e936dfab93ecb.