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

ash/accelerators/accelerator_controller.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/accelerators/accelerator_controller.h"
 
 #include <algorithm>
 #include <cmath>
 #include <iostream>
 #include <string>
@@ skipping 29 matching lines @@
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/system/web_notification/web_notification_tray.h"
 #include "ash/touch/touch_hud_debug.h"
 #include "ash/volume_control_delegate.h"
 #include "ash/wm/overview/window_selector_controller.h"
 #include "ash/wm/partial_screenshot_view.h"
 #include "ash/wm/power_button_controller.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/window_cycle_controller.h"
 #include "ash/wm/window_util.h"
-#include "ash/wm/workspace/snap_sizer.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/base/accelerators/accelerator_manager.h"
 #include "ui/base/events/event.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/compositor/debug_utils.h"
@@ skipping 768 matching lines @@
     case WINDOW_SNAP_RIGHT: {
       aura::Window* window = wm::GetActiveWindow();
       // Disable window docking shortcut key for full screen window due to
       // http://crbug.com/135487.
       if (!window ||
           window->type() != aura::client::WINDOW_TYPE_NORMAL ||
           wm::IsWindowFullscreen(window)) {
         break;
       }
 
-      internal::SnapSizer::SnapWindow(window,
-          action == WINDOW_SNAP_LEFT ? internal::SnapSizer::LEFT_EDGE :
-                                       internal::SnapSizer::RIGHT_EDGE);
+      if (wm::CanSnapWindow(window)) {
+        wm::SnapWindowToEdge(window,
+            action == WINDOW_SNAP_LEFT ? wm::SNAP_LEFT_EDGE :
+                                         wm::SNAP_RIGHT_EDGE);
+      }
       return true;
     }
     case WINDOW_MINIMIZE: {
       aura::Window* window = wm::GetActiveWindow();
       // Attempt to restore the window that would be cycled through next from
       // the launcher when there is no active window.
       if (!window)
         return HandleCycleWindowMRU(WindowCycleController::FORWARD, false);
       // Disable the shortcut for minimizing full screen window due to
       // crbug.com/131709, which is a crashing issue related to minimizing
@@ skipping 145 matching lines @@
     keyboard_brightness_control_delegate) {
   keyboard_brightness_control_delegate_ =
       keyboard_brightness_control_delegate.Pass();
 }
 
 bool AcceleratorController::CanHandleAccelerators() const {
   return true;
 }
 
 }  // namespace ash