Use capturing with XGetImage() only in screenshot_taker.

Use capturing with XGetImage() only in screenshot_taker.

GrabWindowSnapshot() happens in the "Report Issue" (c/b/ui/webui/feedback_ui.cc)
and XGetImage runs earlier than closing the wrench menu.  This could delay the
response on "Report Issue" but it's much more important to work correctly for this specific item.

R=derat@chromium.org
BUG=134818
TEST=manually done on lumpy / selecting "Report Issue" and Ctrl-F5


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=144497

[Daniel Erat, 2012-06-27 13:46:40]

lgtm

[commit-bot: I haz the power, 2012-06-27 14:22:07]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mukai@chromium.org/10694003/1

[commit-bot: I haz the power, 2012-06-27 14:22:15]

Presubmit check for 10694003-1 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Missing LGTM from an OWNER for files in these directories:
    chrome/browser/ui

Presubmit checks took 2.9s to calculate.

[Jun Mukai, 2012-06-27 14:31:41]

sky, please also see this as the OWNER

[sky, 2012-06-27 16:28:10]

LGTM

[commit-bot: I haz the power, 2012-06-27 16:36:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mukai@chromium.org/10694003/1

[commit-bot: I haz the power, 2012-06-27 18:45:06]

Change committed as 144497