[ash-md] Disables rounded corners by default in overview mode

[ash-md] Disables rounded corners by default in overview mode

This CL only changes the default for the --ash-max-previews-to-use-mask
runtime flag to 0 (from 10). Not using masks seems to improve animation.

BUG=632825
TEST=None

Review-Url: https://codereview.chromium.org/2193403002
Cr-Commit-Position: refs/heads/master@{#408748}
(cherry picked from commit bf1dfd597226bb6cd8faf1009e8ba349a7e403aa)

Committed: https://chromium.googlesource.com/chromium/src/+/e7c901e74d2dfbbc10955166a85f07526928c0da

[varkha, 2016-08-05 17:41:41]

Description was changed from

==========
[ash-md] Disables rounded corners by default in overview mode

This CL only changes the default for the --ash-max-previews-to-use-mask
runtime flag to 0 (from 10). Not using masks seems to improve animation.

BUG=632825
TEST=None

Review-Url: https://codereview.chromium.org/2193403002
Cr-Commit-Position: refs/heads/master@{#408748}
(cherry picked from commit bf1dfd597226bb6cd8faf1009e8ba349a7e403aa)
==========

to

==========
[ash-md] Disables rounded corners by default in overview mode

This CL only changes the default for the --ash-max-previews-to-use-mask
runtime flag to 0 (from 10). Not using masks seems to improve animation.

BUG=632825
TEST=None

Review-Url: https://codereview.chromium.org/2193403002
Cr-Commit-Position: refs/heads/master@{#408748}
(cherry picked from commit bf1dfd597226bb6cd8faf1009e8ba349a7e403aa)

Committed:
https://chromium.googlesource.com/chromium/src/+/e7c901e74d2dfbbc10955166a85f...
==========

[varkha, 2016-08-05 17:41:43]

Committed patchset #1 (id:1) manually as
e7c901e74d2dfbbc10955166a85f07526928c0da.