Enables docked windows by default

ash/ash_switches.h

Index: ash/ash_switches.h
diff --git a/ash/ash_switches.h b/ash/ash_switches.h
index f92cbbb14caadc07430aa40fce6a0b5c47f58519..b3bd2a0a145c02fe4f2f184225ae372207101f47 100644
--- a/ash/ash_switches.h
+++ b/ash/ash_switches.h
@@ -31,6 +31,7 @@ ASH_EXPORT extern const char kAshDisableAudioDeviceMenu[];
 ASH_EXPORT extern const char kAshDisableAlternateFrameCaptionButtonStyle[];
 ASH_EXPORT extern const char kAshDisableAutoMaximizing[];
 ASH_EXPORT extern const char kAshDisableDisplayChangeLimiter[];
+ASH_EXPORT extern const char kAshDisableDockedWindows[];
 ASH_EXPORT extern const char kAshDisableDragOffShelf[];
 ASH_EXPORT extern const char kAshDisableOverviewMode[];
 ASH_EXPORT extern const char kAshDisableDragAndDropAppListToLauncher[];
@@ -41,7 +42,6 @@ ASH_EXPORT extern const char kAshEnableAudioDeviceMenu[];
 ASH_EXPORT extern const char kAshEnableAdvancedGestures[];
 ASH_EXPORT extern const char kAshEnableAlternateFrameCaptionButtonStyle[];
 ASH_EXPORT extern const char kAshEnableBrightnessControl[];
-ASH_EXPORT extern const char kAshEnableDockedWindows[];
 #if defined(OS_CHROMEOS)
 ASH_EXPORT extern const char kAshEnableFullMultiProfileMode[];
 #endif
@@ -91,6 +91,9 @@ ASH_EXPORT bool UseFullMultiProfileMode();
 // Returns true if overview mode should be activated for window switching.
 ASH_EXPORT bool UseOverviewMode();
 
+// Returns true if docked windows feature is enabled.
+ASH_EXPORT bool UseDockedWindows();
+
 #if defined(OS_CHROMEOS)
 // Returns true if new audio handler should be used.
 ASH_EXPORT bool UseNewAudioHandler();