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 079e796b30fa6935aa851ca0654383791557c73b..30b64b1df4d06e1f79094285b25ecd8baf40507e 100644
--- a/ui/aura/aura_switches.cc
+++ b/ui/aura/aura_switches.cc
@@ -12,6 +12,10 @@ const char kAuraHostWindowSize[] = "aura-host-window-size";
 // Avoid drawing drop shadows under windows.
 const char kAuraNoShadows[] = "aura-no-shadows";
 
+// 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";
+
 // Use Aura-style window frames and drag behavior.
 const char kAuraWindows[] = "aura-windows";