Use SetWindowPos on DirectComposition child window.

Use SetWindowPos on DirectComposition child window.

With this change we force a repaint on resize, which clears away the white square in the nonclient area left over from window creation. Switching to SetWindowPos adds flexibility in letting us specify SWP_NOCOPYBITS, which is more efficient as the backbuffer contents don't actually matter.

BUG=582877
Committed: https://crrev.com/1d9608302c47f63c138f330baafafd38539e77e4
Cr-Commit-Position: refs/heads/master@{#374849}

[jbauman, 2016-02-10 21:07:02]

jbauman@chromium.org changed reviewers:
+ kbr@chromium.org

[Ken Russell (switch to Gerrit), 2016-02-11 01:07:29]

lgtm

https://codereview.chromium.org/1676413004/diff/1/content/common/gpu/child_wi...
File content/common/gpu/child_window_surface_win.cc (right):

https://codereview.chromium.org/1676413004/diff/1/content/common/gpu/child_wi...
content/common/gpu/child_window_surface_win.cc:144: // Only force a resize and
redraw.
Could you expand upon this comment a little bit? Why say "Only", for example?

[jbauman, 2016-02-11 02:41:56]

The CQ bit was checked by jbauman@chromium.org

[jbauman, 2016-02-11 02:41:57]

The patchset sent to the CQ was uploaded after l-g-t-m from kbr@chromium.org
Link to the patchset: https://codereview.chromium.org/1676413004/#ps20001
(title: ";")

[commit-bot: I haz the power, 2016-02-11 02:43:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1676413004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1676413004/20001

[commit-bot: I haz the power, 2016-02-11 03:28:46]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-02-16 22:34:24]

Description was changed from

==========
Use SetWindowPos on DirectComposition child window.

With this change we force a repaint on resize, which clears away the white
square in the nonclient area left over from window creation. Switching to
SetWindowPos adds flexibility in letting us specify SWP_NOCOPYBITS, which is
more efficient as the backbuffer contents don't actually matter.

BUG=582877
==========

to

==========
Use SetWindowPos on DirectComposition child window.

With this change we force a repaint on resize, which clears away the white
square in the nonclient area left over from window creation. Switching to
SetWindowPos adds flexibility in letting us specify SWP_NOCOPYBITS, which is
more efficient as the backbuffer contents don't actually matter.

BUG=582877

Committed: https://crrev.com/1d9608302c47f63c138f330baafafd38539e77e4
Cr-Commit-Position: refs/heads/master@{#374849}
==========

[commit-bot: I haz the power, 2016-02-16 22:34:25]

Patchset 2 (id:??) landed as
https://crrev.com/1d9608302c47f63c138f330baafafd38539e77e4
Cr-Commit-Position: refs/heads/master@{#374849}