Add always-on-top property to app windows

chrome/browser/ui/views/frame/browser_view.cc

Index: chrome/browser/ui/views/frame/browser_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_view.cc b/chrome/browser/ui/views/frame/browser_view.cc
index 75e64af9578e207b40ef91e6dc6e06dabb6949a6..2fefb669d83ac12613024ac19d4bdde874a471cd 100644
--- a/chrome/browser/ui/views/frame/browser_view.cc
+++ b/chrome/browser/ui/views/frame/browser_view.cc
@@ -700,6 +700,11 @@ bool BrowserView::IsAlwaysOnTop() const {
   return false;
 }
 
+void BrowserView::SetAlwaysOnTop(bool always_on_top) {
+  // Not implemented for browser windows.
+  NOTIMPLEMENTED();

[sky, 2013/10/10 02:47:52]

Why not make this and IsALwaysOnTop real?

[tmdiep, 2013/10/10 04:02:01]

Can we leave unimplemented for browser windows until there is a need?

+}
+
 gfx::NativeWindow BrowserView::GetNativeWindow() {
   // While the browser destruction is going on, the widget can already be gone,
   // but utility functions like FindBrowserWithWindow will come here and crash.