Stick windows to sides of workspaces

ash/root_window_controller.h

Index: ash/root_window_controller.h
diff --git a/ash/root_window_controller.h b/ash/root_window_controller.h
index f8855a7fdc105332b4c6ac5df6be187fd60f6e13..a62ae2294ce0d75e82620b83b41af5b9969233a4 100644
--- a/ash/root_window_controller.h
+++ b/ash/root_window_controller.h
@@ -43,6 +43,7 @@ class ToplevelWindowEventHandler;
 namespace internal {
 
 class BootSplashScreen;
+class DockLayoutManager;
 class PanelLayoutManager;
 class RootWindowLayoutManager;
 class ScreenDimmer;
@@ -192,6 +193,9 @@ class ASH_EXPORT RootWindowController {
   // The shelf for managing the launcher and the status widget.
   scoped_ptr<ShelfWidget> shelf_;
 
+  // Manages layout of docked windows. Owned by DockContainer.
+  DockLayoutManager* dock_layout_manager_;
+
   // Manages layout of panels. Owned by PanelContainer.
   PanelLayoutManager* panel_layout_manager_;
 
@@ -211,6 +215,7 @@ class ASH_EXPORT RootWindowController {
   scoped_ptr<ToplevelWindowEventHandler> modal_container_handler_;
   scoped_ptr<ToplevelWindowEventHandler> lock_modal_container_handler_;
   scoped_ptr<ToplevelWindowEventHandler> panel_container_handler_;
+  scoped_ptr<ToplevelWindowEventHandler> dock_container_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };