Remove "Alternate frame caption button style" command line flag

ash/ash_switches.h

Index: ash/ash_switches.h
diff --git a/ash/ash_switches.h b/ash/ash_switches.h
index 193744039917def499ff15ffa42c8d84fec83350..d41364a880b903493ef56b9fd116c845ecdda560 100644
--- a/ash/ash_switches.h
+++ b/ash/ash_switches.h
@@ -24,9 +24,7 @@ ASH_EXPORT extern const char kAshDebugShortcuts[];
 ASH_EXPORT extern const char kAshDefaultWallpaperIsOem[];
 ASH_EXPORT extern const char kAshDefaultWallpaperLarge[];
 ASH_EXPORT extern const char kAshDefaultWallpaperSmall[];
-ASH_EXPORT extern const char kAshDisableAlternateFrameCaptionButtonStyle[];
 ASH_EXPORT extern const char kAshDisableDockedWindows[];
-ASH_EXPORT extern const char kAshEnableAlternateFrameCaptionButtonStyle[];
 #if defined(OS_CHROMEOS)
 ASH_EXPORT extern const char kAshEnableMagnifierKeyScroller[];
 #endif
@@ -46,10 +44,6 @@ ASH_EXPORT extern const char kAuraLegacyPowerButton[];
 ASH_EXPORT extern const char kForceAshToDesktop[];
 #endif
 
-// Returns true if the alternate visual style for the caption buttons (minimize,
-// maximize, restore, close) should be used.
-ASH_EXPORT bool UseAlternateFrameCaptionButtonStyle();
-
 // Returns true if items can be dragged off the shelf to unpin.
 ASH_EXPORT bool UseDragOffShelf();