Don't show the titlebar in fullscreen windows on ash.

ash/wm/custom_frame_view_ash.cc

Index: ash/wm/custom_frame_view_ash.cc
diff --git a/ash/wm/custom_frame_view_ash.cc b/ash/wm/custom_frame_view_ash.cc
index 77977f2f51c66ad62a351d33aab952e3d102e243..a7f7517a9b9a4b1dba6faa2864ef7ffde305932b 100644
--- a/ash/wm/custom_frame_view_ash.cc
+++ b/ash/wm/custom_frame_view_ash.cc
@@ -125,6 +125,9 @@ void CustomFrameViewAsh::Layout() {
 }
 
 void CustomFrameViewAsh::OnPaint(gfx::Canvas* canvas) {
+  if (frame_->IsFullscreen())

[Ben Goodger (Google), 2012/10/08 18:20:00]

Would your change to NonClientTopBorderHeight() result in this area not being
painted anyway? If so is it possible to just dcheck this?

[jeremya, 2012/10/08 18:25:16]

OnPaint still seems to get called when NonClientTopBorderHeight returns 0.

+    return;
+
   bool paint_as_active = ShouldPaintAsActive();
   int theme_image_id = paint_as_active ? IDR_AURA_WINDOW_HEADER_BASE_ACTIVE :
       IDR_AURA_WINDOW_HEADER_BASE_INACTIVE;
@@ -171,6 +174,9 @@ void CustomFrameViewAsh::ButtonPressed(views::Button* sender,
 // CustomFrameViewAsh, private:
 
 int CustomFrameViewAsh::NonClientTopBorderHeight() const {
+  if (frame_->IsFullscreen())
+    return 0;
+
   // Reserve enough space to see the buttons, including any offset from top and
   // reserving space for the separator line.
   return close_button_->bounds().bottom() +