Aura: Add --aura-laptop-mode to fill the workspace with a single window.

ui/aura/aura_switches.cc

Index: ui/aura/aura_switches.cc
diff --git a/ui/aura/aura_switches.cc b/ui/aura/aura_switches.cc
index 6070d04f4480df0f9e4b49885ce2d839be4d24fb..41aa0d8a5722650a4acdb10edc16dd22ca25b732 100644
--- a/ui/aura/aura_switches.cc
+++ b/ui/aura/aura_switches.cc
@@ -9,6 +9,10 @@ namespace switches {
 // Initial dimensions for the host window in the form "1024x768".
 const char kAuraHostWindowSize[] = "aura-host-window-size";
 
+// Show only a single maximized window, like traditional non-Aura builds.
+// Useful for low-resolution screens, such as on laptops.
+const char kAuraLaptopMode[] = "aura-laptop-mode";
+
 // Avoid drawing drop shadows under windows.
 const char kAuraNoShadows[] = "aura-no-shadows";