Stick windows to sides of workspaces

ash/wm/dock/dock_types.h

Index: ash/wm/dock/dock_types.h
diff --git a/ash/wm/dock/dock_types.h b/ash/wm/dock/dock_types.h
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+++ b/ash/wm/dock/dock_types.h
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+// Copyright (c) 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.
+
+#ifndef ASH_WM_DOCK_DOCK_TYPES_H_
+#define ASH_WM_DOCK_DOCK_TYPES_H_
+
+namespace ash {
+
+namespace internal {
+
+// Possible values of which side of the screen the windows are docked at.
+enum DockedAlignment {
+  DOCKED_ALIGNMENT_NONE,
+  DOCKED_ALIGNMENT_LEFT,
+  DOCKED_ALIGNMENT_RIGHT,
+  DOCKED_ALIGNMENT_ANY,
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_DOCK_DOCK_TYPES_H_