Makes Wiget::OnNativeWidgetMove() be invoked during a maximize

Makes Wiget::OnNativeWidgetMove() be invoked during a maximize

A maximize animation triggers recreating the layer of the
window. Recreating the layer forces the bounds of the window to 0. A
maximize results in the origin going to 0. Together this meant a
maximize from any where resulted in the code not thinking a move
happened.

This patch special cases NativeWidgetAura::OnBoundsChanged to assume
that if the old bounds was empty at 0,0 and the new bounds is not
empty that a move happened.

BUG=335486
TEST=covered by test
R=ben@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=248908

[Ben Goodger (Google), 2014-02-05 00:44:41]

lgtm

[sky, 2014-02-05 00:59:37]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-02-05 03:52:28]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sky@chromium.org/153803006/1

[commit-bot: I haz the power, 2014-02-05 07:47:48]

Change committed as 248908