Add always-on-top property to app windows

chrome/browser/ui/panels/panel.h

Index: chrome/browser/ui/panels/panel.h
diff --git a/chrome/browser/ui/panels/panel.h b/chrome/browser/ui/panels/panel.h
index 8ce650b6b6e1328fd7ffc2eaaab89700f7c2e0d1..3e5bde59b7b1e11adc326dc5da35063af8101759 100644
--- a/chrome/browser/ui/panels/panel.h
+++ b/chrome/browser/ui/panels/panel.h
@@ -133,6 +133,7 @@ class Panel : public ui::BaseWindow,
   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
   virtual void FlashFrame(bool flash) OVERRIDE;
   virtual bool IsAlwaysOnTop() const OVERRIDE;
+  virtual void SetAlwaysOnTop(bool on_top) OVERRIDE;
 
   // Overridden from CommandUpdaterDelegate:
   virtual void ExecuteCommandWithDisposition(
@@ -245,9 +246,6 @@ class Panel : public ui::BaseWindow,
   // Handles keyboard events coming back from the renderer.
   void HandleKeyboardEvent(const content::NativeWebKeyboardEvent& event);
 
-  // Whether the panel window is always on top.
-  void SetAlwaysOnTop(bool on_top);
-
   // Sets whether the panel is shown in preview mode. When the panel is
   // being dragged, it is in preview mode.
   void SetPreviewMode(bool in_preview_mode);