Undocks window first before side-snapping bounds

ash/wm/workspace/snap_sizer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/workspace/snap_sizer.h"
 
 #include <cmath>
 
 #include "ash/ash_switches.h"
 #include "ash/screen_ash.h"
@@ skipping 148 matching lines @@
 
 SnapSizer::~SnapSizer() {
 }
 
 void SnapSizer::SnapWindow(wm::WindowState* window_state,
                            SnapSizer::Edge edge) {
   if (!window_state->CanSnap())
     return;
   internal::SnapSizer sizer(window_state, gfx::Point(), edge,
       internal::SnapSizer::OTHER_INPUT);
+  window_state->SetWindowShowType(edge == LEFT_EDGE ?
+      wm::SHOW_TYPE_LEFT_SNAPPED : wm::SHOW_TYPE_RIGHT_SNAPPED);
   SnapWindowToBounds(window_state, edge,
                      sizer.GetSnapBounds(window_state->window()->bounds()));
 }
 
 void SnapSizer::SnapWindowToTargetBounds() {
+  window_state_->SetWindowShowType(edge_ == LEFT_EDGE ?
+      wm::SHOW_TYPE_LEFT_SNAPPED : wm::SHOW_TYPE_RIGHT_SNAPPED);
+  target_bounds_ = GetTargetBounds();
   SnapWindowToBounds(window_state_, edge_, target_bounds());
 }
 
 void SnapSizer::Update(const gfx::Point& location) {
   // See description above for details on this behavior.
   num_moves_since_adjust_++;
   if ((base::TimeTicks::Now() - time_last_update_).InMilliseconds() >
       kDelayBeforeIncreaseMS) {
     ChangeBounds(location.x(),
                  CalculateIncrement(location.x(), last_update_x_));
@@ skipping 102 matching lines @@
 }
 
 bool SnapSizer::AlongEdge(int x) const {
   gfx::Rect area(ScreenAsh::GetDisplayWorkAreaBoundsInParent(
       window_state_->window()));
   return (x <= area.x()) || (x >= area.right() - 1);
 }
 
 }  // namespace internal
 }  // namespace ash