Make panels not show on top when there is an app running in full screen mode.

chrome/browser/ui/panels/panel_window_controller_cocoa.mm

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/panels/panel_window_controller_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 94 matching lines @@
   return [BrowserWindowUtils themePatternPhaseFor:windowView withTabStrip:nil];
 }
 
 - (void)awakeFromNib {
   NSWindow* window = [self window];
 
   DCHECK(window);
   DCHECK(titlebar_view_);
   DCHECK_EQ(self, [window delegate]);
 
-  [window setLevel:NSStatusWindowLevel];
+  if (!windowShim_->panel()->manager()->is_full_screen_mode_on())
+    [window setLevel:NSStatusWindowLevel];
 
   if (base::mac::IsOSSnowLeopardOrLater()) {
     [window setCollectionBehavior:
         NSWindowCollectionBehaviorParticipatesInCycle];
   }
 
   [titlebar_view_ attach];
 
   // Set initial size of the window to match the size of the panel to give
   // the renderer the proper size to work with earlier, avoiding a resize
@@ skipping 433 matching lines @@
   BrowserWindow* browser_window =
       windowShim_->panel()->manager()->GetNextBrowserWindowToActivate(
           windowShim_->panel());
 
   if (browser_window)
     browser_window->Activate();
   else
     [NSApp deactivate];
 }
 
+- (void)fullScreenModeChanged:(bool)isFullScreenModeOn {
+  NSWindow* window = [self window];
+  if (isFullScreenModeOn) {

[Dmitry Titov, 2011/11/30 01:35:53]

'{' is not needed (and not balanced here).
Since only a value to set is different, I'd prefer this form:
[window setLevel:(isFullScreenModeOn ? one : another)];

[prasadt, 2011/11/30 02:38:47]

Done. And oops :-) I haven't yet compiled on mac.

+    [window setLevel:NSStatusWindowLevel];
+  else {
+    [window setLevel:NSNormalWindowLevel];
+}
+
 - (BOOL)canBecomeKeyWindow {
   // Panel can only gain focus if it is expanded. Minimized panels do not
   // participate in Cmd-~ rotation.
   // TODO(dimich): If it will be ever desired to expand/focus the Panel on
   // keyboard navigation or via main menu, the care should be taken to avoid
   // cases when minimized Panel is getting keyboard input, invisibly.
   return windowShim_->panel()->expansion_state() == Panel::EXPANDED;
 }
 
 @end