Remove docked windows entirely in M59.

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 c6770ea43d268c4afe468587e2a121dda3329d4e..e096ad34915bd660270ea80516c5f45f1651c83e 100644
--- a/ash/common/ash_switches.cc
+++ b/ash/common/ash_switches.cc
@@ -55,10 +55,6 @@ const char kAshEnableMagnifierKeyScroller[] =
 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";
 
@@ -105,10 +101,5 @@ bool ConstrainPointerToRoot() {
              kAshConstrainPointerToRoot);
 }
 
-bool DockedWindowsEnabled() {
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(
-      ash::switches::kAshEnableDockedWindows);
-}
-
 }  // namespace switches
 }  // namespace ash