Draw panel titlebars on Aura.

Since panel windows aren't transparent, we didn't draw anything so the
titlebars for panels were black with buttons drawn on top.

BUG=none
TEST=manual


Review URL: http://codereview.chromium.org/10169044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133891 0039d316-1c4b-4281-b951-d872f2087c98

ash/wm/frame_painter.cc

@@ -119,7 +119,8 @@ bool IsVisibleNormalWindow(aura::Window* window) {
   // IsVisible() also tracks the layer visibility state.
   return window &&
     window->TargetVisibility() &&
-    window->type() == aura::client::WINDOW_TYPE_NORMAL;
+    (window->type() == aura::client::WINDOW_TYPE_NORMAL ||
+     window->type() == aura::client::WINDOW_TYPE_PANEL);
 }
 
 }  // namespace