Adds a NonClientFrameView for generic toplevel windows.

ui/aura/desktop_host_linux.cc

Index: ui/aura/desktop_host_linux.cc
===================================================================
--- ui/aura/desktop_host_linux.cc	(revision 102277)
+++ ui/aura/desktop_host_linux.cc	(working copy)
@@ -30,6 +30,7 @@
   virtual void Show() OVERRIDE;
   virtual gfx::Size GetSize() OVERRIDE;
   virtual void SetSize(const gfx::Size& size) OVERRIDE;
+  virtual void SetCursor(CursorType cursor_type) OVERRIDE;
 
   Desktop* desktop_;
 
@@ -113,6 +114,10 @@
   XResizeWindow(xdisplay_, xwindow_, size.width(), size.height());
 }
 
+void DesktopHostLinux::SetCursor(CursorType cursor_type) {
+  NOTIMPLEMENTED();
+}
+
 }  // namespace
 
 // static