Hide docked windows behind a flag

ash/common/ash_switches.cc

Index: ash/common/ash_switches.cc
diff --git a/ash/common/ash_switches.cc b/ash/common/ash_switches.cc
index e9eb255ddae2d24c172b000b2d2b7c5c91c202c9..d912f1494084bf67939be4b7b0db627931e08be3 100644
--- a/ash/common/ash_switches.cc
+++ b/ash/common/ash_switches.cc
@@ -58,6 +58,10 @@ const char kAshEnablePalette[] = "ash-enable-palette";
 const char kAshEnablePaletteOnAllDisplays[] =
     "ash-enable-palette-on-all-displays";
 
+// Enables docking windows to the right or left (not to be confused with snapped
+// windows).
+const char kAshEnableDockedWindows[] = "ash-enable-docked-windows";
+
 // Enables the observation of accelerometer events to enter touch-view mode.
 const char kAshEnableTouchView[] = "enable-touchview";
 
@@ -99,5 +103,10 @@ bool ConstrainPointerToRoot() {
              kAshConstrainPointerToRoot);
 }
 
+bool DockedWindowsEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      ash::switches::kAshEnableDockedWindows);
+}
+
 }  // namespace switches
 }  // namespace ash