Fix crasher in LocationBarViewMac::PageActionImageView::OnImageLoaded.
Fix crasher in LocationBarViewMac::PageActionImageView::OnImageLoaded.

Scott's insight in comment 18 on the bug report was correct; fixed by relinquishing control on call to UpdatePageActions, so that we don't try to look at the private variables of a dying this ptr.

BUG= 35864
TEST= no crash.

Review URL: http://codereview.chromium.org/1397001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@42764 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser