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 699 matching lines @@
             HandleKeyboardBrightnessDown(accelerator);
       break;
     case KEYBOARD_BRIGHTNESS_UP:
       if (keyboard_brightness_control_delegate_)
         return keyboard_brightness_control_delegate_->
             HandleKeyboardBrightnessUp(accelerator);
       break;
     case VOLUME_MUTE:
       return shell->system_tray_delegate()->GetVolumeControlDelegate()->
           HandleVolumeMute(accelerator);
       break;

[Mr4D (OOO till 08-26), 2013/09/06 21:57:54]

Can you remove this break?

     case VOLUME_DOWN:
       return shell->system_tray_delegate()->GetVolumeControlDelegate()->
           HandleVolumeDown(accelerator);
       break;

[Mr4D (OOO till 08-26), 2013/09/06 21:57:54]

ditto

     case VOLUME_UP:
       return shell->system_tray_delegate()->GetVolumeControlDelegate()->
           HandleVolumeUp(accelerator);
       break;

[Mr4D (OOO till 08-26), 2013/09/06 21:57:54]

And so on

     case FOCUS_LAUNCHER:
       return shell->focus_cycler()->FocusWidget(
           Launcher::ForPrimaryDisplay()->shelf_widget());
       break;
     case FOCUS_NEXT_PANE:
       return HandleRotatePaneFocus(Shell::FORWARD);
     case FOCUS_PREVIOUS_PANE:
       return HandleRotatePaneFocus(Shell::BACKWARD);
     case SHOW_KEYBOARD_OVERLAY:
       ash::Shell::GetInstance()->delegate()->ShowKeyboardOverlay();
@@ skipping 90 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);
+      using internal::SnapSizer;
+      if (SnapSizer::CanSnapWindow(window)) {
+        SnapSizer::Edge edge = (action == WINDOW_SNAP_LEFT) ?
+            SnapSizer::LEFT_EDGE : SnapSizer::RIGHT_EDGE;
+        SnapSizer::SnapWindow(window, edge, SnapSizer::STEP_YES);
+      }
       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