Stick windows to sides of workspaces

ash/wm/property_util.h

Index: ash/wm/property_util.h
diff --git a/ash/wm/property_util.h b/ash/wm/property_util.h
index 97d7b24b4cac6f16b0e5e867f407ec34e29b82bf..81f8fedae7cfe372619e8547d35f0a303c43b34b 100644
--- a/ash/wm/property_util.h
+++ b/ash/wm/property_util.h
@@ -62,6 +62,20 @@ ASH_EXPORT void SetWindowAlwaysRestoresToRestoreBounds(aura::Window* window,
 ASH_EXPORT bool GetWindowAlwaysRestoresToRestoreBounds(
     const aura::Window* window);
 
+// Enum for possible edges that a window is docked on to the dock
+enum DockEdge {
+  DOCK_EDGE_NONE,
+  DOCK_EDGE_LEFT,
+  DOCK_EDGE_RIGHT,
+};
+
+// Sets whether the specified window is docked near a screen edge.
+// Default is DOCK_EDGE_NONE and may change when a window is moved by user or
+// when the launcher shelf alignment is changed.
+ASH_EXPORT void SetDockEdge(aura::Window* window, DockEdge value);
+ASH_EXPORT DockEdge GetDockEdge(const aura::Window* window);
+bool IsWindowDocked(const aura::Window* window);
+
 // Sets whether the specified window is tracked by workspace code. Default is
 // true. If set to false the workspace does not switch the current workspace,
 // nor does it attempt to impose constraints on the bounds of the window. This