linux: Fix grabs for popups belonging to inactive tabs.

When displaying a popup for an inactive tab, grab input on
behalf of the popup's window rather than its parent window.

Also removes window-group code that doesn't make sense to me
here (the popup wants all input rather than just input for a
subset of browser windows, as shown by the way that it's
doing X grabs).

BUG=126296
TEST=manual

Review URL: https://chromiumcodereview.appspot.com/10380044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@135966 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed