fix PanelBrowserTest.MinimizeRestore tests on win_aura

(I can't see any good reason why this code was disabled on aura)

R=jam@chromium.org
BUG=154081
TEST=interactive_ui_tests on win_aura, PanelBrowserTest.MinimizeRestore*

Review URL: https://codereview.chromium.org/11416351

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171087 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/views/panels/panel_view.cc

@@ -394,7 +394,7 @@ void PanelView::DeactivatePanel() {
   if (!focused_)
     return;
 
-#if defined(OS_WIN) && !defined(AURA) && !defined(USE_ASH)
+#if defined(OS_WIN)
   // Need custom behavior for always-on-top panels to avoid
   // the OS activating a minimized panel when this one is
   // deactivated.