Only support left/right maximizing at 50% width when the --ash-enable-alternate-caption-button

ash/wm/gestures/two_finger_drag_handler.cc

Index: ash/wm/gestures/two_finger_drag_handler.cc
diff --git a/ash/wm/gestures/two_finger_drag_handler.cc b/ash/wm/gestures/two_finger_drag_handler.cc
index 49f7ecc02dd530562bc4ea759a95a19b28e0197a..db95e4e813fc080ee86f32199f5c0ba6cdb09c46 100644
--- a/ash/wm/gestures/two_finger_drag_handler.cc
+++ b/ash/wm/gestures/two_finger_drag_handler.cc
@@ -6,7 +6,6 @@
 
 #include "ash/wm/window_resizer.h"
 #include "ash/wm/window_util.h"
-#include "ash/wm/workspace/snap_sizer.h"
 #include "ui/aura/client/window_types.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
@@ -147,9 +146,9 @@ bool TwoFingerDragHandler::ProcessGestureEvent(aura::Window* target,
             target->layer()->GetAnimator());
         scoped_setter.SetPreemptionStrategy(
             ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS);
-        internal::SnapSizer::SnapWindow(target,
-            event.details().swipe_left() ? internal::SnapSizer::LEFT_EDGE :
-                                           internal::SnapSizer::RIGHT_EDGE);
+        wm::SnapWindowToEdge(target,
+            event.details().swipe_left() ? wm::SNAP_LEFT_EDGE :
+                                           wm::SNAP_RIGHT_EDGE);
       }
       return true;
     }