Fix issue 32106

Fix issue 32106

Issue 32106 happens when user creates a browser window without creating
desktop shortcut. In this case, Windows does not have sufficient
relaunching info to support pinning the browser window. The fix is to
create a shortcut in "User Pinned" folder which Win7 watches and would
get relaunch info from it.

Also fix a minor bug in win_util::SetAppIdForWindow that would make the
function only work for Win7 but not above.

BUG=32106
TEST=Verify fix for 32106. See comemnts #1 and #5 for repro steps.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=39963

[xiyuan, 2010-02-24 23:23:57]

sky, could you review this CL? Thanks.

[sky, 2010-02-24 23:33:06]

LGTM