Stick windows to sides of workspaces

ash/wm/dock/dock_edge_types.h

Index: ash/wm/dock/dock_edge_types.h
diff --git a/ash/wm/dock/dock_edge_types.h b/ash/wm/dock/dock_edge_types.h
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+++ b/ash/wm/dock/dock_edge_types.h
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+// 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.
+
+#ifndef ASH_WM_DOCK_DOCK_EDGE_TYPES_H_
+#define ASH_WM_DOCK_DOCK_EDGE_TYPES_H_
+
+namespace ash {
+
+// Enum for bits that contain edges that a window can be stuck to.
+// Multiple edges can be combined in a bitmask.
+enum DockEdge {
+  DOCK_EDGE_NONE   = 0,
+  DOCK_EDGE_LEFT   = 1 << 0,
+  DOCK_EDGE_RIGHT  = 1 << 1,
+  DOCK_EDGE_TOP    = 1 << 2,
+  DOCK_EDGE_BOTTOM = 1 << 3,
+};
+
+const uint32 kAllDockEdges =
+    DOCK_EDGE_LEFT | DOCK_EDGE_RIGHT | DOCK_EDGE_TOP | DOCK_EDGE_BOTTOM;
+
+}  // namespace ash
+
+#endif  // ASH_WM_DOCK_DOCK_EDGE_TYPES_H_