Stick windows to sides of workspaces

ash/wm/workspace/workspace_layout_manager.h

Index: ash/wm/workspace/workspace_layout_manager.h
diff --git a/ash/wm/workspace/workspace_layout_manager.h b/ash/wm/workspace/workspace_layout_manager.h
index 50942682f7dbc7b7ceaca747630290a8dd33d1c2..bbbb61633e97439a9434ca03ed4407935a0ed58a 100644
--- a/ash/wm/workspace/workspace_layout_manager.h
+++ b/ash/wm/workspace/workspace_layout_manager.h
@@ -107,6 +107,24 @@ class ASH_EXPORT WorkspaceLayoutManager
   // true is returned. Does nothing otherwise.
   bool SetMaximizedOrFullscreenBounds(aura::Window* window);
 
+  // Enum for bits that contain edges that a window can be stuck to.
+  // Multiple edges can be combined in a bitmask
+  enum StuckWindowEdges {
+     EDGE_NONE = 0,
+     EDGE_LEFT = 1,
+     EDGE_RIGHT = 2,
+     EDGE_TOP = 4,
+     EDGE_BOTTOM = 8,
+     EDGE_ALL = EDGE_LEFT | EDGE_RIGHT | EDGE_TOP | EDGE_BOTTOM
+  };
+
+  // set the bitmask with edges
+  int CalculateStuckEdges(aura::Window* window);
+
+  // restores stuck state for right or bottom edges
+  gfx::Rect AdjustWindowBoundsForStuckEdges(aura::Window* window,
+                                            const gfx::Rect& bounds);
+
   WorkspaceManager* workspace_manager();
 
   aura::RootWindow* root_window_;