[win] Explicitly hide the bubble widget after creation.

[win] Explicitly hide the bubble widget after creation.

This is to explicitly set the SWP_HIDEWINDOW flag which it seems Windows
might not set by default on future WM_WINDOWPOSCHANGED messages.
Potentially resulting in the border widget being shown without the
bubble contents.

BUG=231687
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=195431

[tapted, 2013-04-19 11:34:34]

Hi xiyuan, could you take a look? This is a somewhat speculative fix, but it
shouldn't cause regressions. See http://crbug.com/231687 for the details.

[xiyuan, 2013-04-19 16:02:22]

LGTM

[commit-bot: I haz the power, 2013-04-19 22:33:08]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tapted@chromium.org/14267014/1

[commit-bot: I haz the power, 2013-04-20 02:00:46]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win_x64_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_x64_re...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-04-21 23:06:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tapted@chromium.org/14267014/1

[commit-bot: I haz the power, 2013-04-21 23:07:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tapted@chromium.org/14267014/1

[commit-bot: I haz the power, 2013-04-21 23:30:32]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win_x64_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_x64_re...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[tapted, 2013-04-22 02:07:04]

Committed patchset #1 manually as r195431 (presubmit successful).