Change behaviour of the Alt-] and Alt-[ keys so that it cycles through SnapLeft/SnapRight to DockLe…

ash/wm/dock/docked_window_resizer.cc

 // Copyright 2013 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/dock/docked_window_resizer.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf.h"
@@ skipping 180 matching lines @@
   // At this point we are not yet animating the window as it may not be
   // inside the docked area.
   dock_layout_->StartDragging(GetTarget());
   // Reparent workspace windows during the drag to elevate them above workspace.
   // Other windows for which the DockedWindowResizer is instantiated include
   // panels and windows that are already docked. Those do not need reparenting.
   if (GetTarget()->type() != ui::wm::WINDOW_TYPE_PANEL &&
       GetTarget()->parent()->id() == kShellWindowId_DefaultContainer) {
     // Reparent the window into the docked windows container in order to get it
     // on top of other docked windows.
-    aura::Window* docked_container = Shell::GetContainer(
-        GetTarget()->GetRootWindow(),
-        kShellWindowId_DockedContainer);
-    wm::ReparentChildWithTransientChildren(GetTarget(),
-                                           GetTarget()->parent(),
-                                           docked_container);
+    wm::DockWindow(GetTarget());
   }
   if (is_docked_)
     dock_layout_->DockDraggedWindow(GetTarget());
 }
 
 void DockedWindowResizer::FinishedDragging(
     aura::client::WindowMoveResult move_result) {
   if (!did_move_or_resize_)
     return;
   did_move_or_resize_ = false;
@@ skipping 107 matching lines @@
   } else if (wm::GetWindowState(window)->IsDocked() &&
              action == DOCKED_ACTION_UNDOCK) {
     const wm::WMEvent event(wm::WM_EVENT_NORMAL);
     window_state_->OnWMEvent(&event);
   }
 
   return action;
 }
 
 }  // namespace ash