Add in gesture for immersive mode

ash/root_window_controller.h

 // 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_ROOT_WINDOW_CONTROLLER_H_
 #define ASH_ROOT_WINDOW_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/system/user/login_status.h"
@@ skipping 155 matching lines @@
   // Moves child windows to |dest|.
   void MoveWindowsTo(aura::RootWindow* dest);
 
   // Force the shelf to query for it's current visibility state.
   void UpdateShelfVisibility();
 
   // Returns true if the active workspace is in immersive mode. Exposed here
   // so clients of Ash don't need to know the details of workspace management.
   bool IsImmersiveMode() const;
 
+  // Sets kPendingImmersiveGestureKey if the active workspace is in immersive
+  // mode. Exposed here so clients of Ash don't need to know the details of
+  // workspace management.
+  void SetPendingImmersiveGesture(bool value);

[James Cook, 2013/04/22 18:19:28]

This doesn't feel like it belongs in the RootWindowController. In fact, Peter
just removed the IsImmersiveMode() function above and I think we can remove the
kImmersiveMode window property key.  Can this be wired to call up through the
ChromeShellDelegate and query immersive mode from there?

[rharrison, 2013/04/22 18:36:52]

I suspect so, I will have to look into it.

+
  private:
   // Creates each of the special window containers that holds windows of various
   // types in the shell UI.
   void CreateContainersInRootWindow(aura::RootWindow* root_window);
 
   // Initializes the virtual keyboard.
   void InitKeyboard();
 
   scoped_ptr<aura::RootWindow> root_window_;
   RootWindowLayoutManager* root_window_layout_;
@@ skipping 24 matching lines @@
   scoped_ptr<ToplevelWindowEventHandler> lock_modal_container_handler_;
   scoped_ptr<ToplevelWindowEventHandler> panel_container_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };
 
 }  // namespace internal
 }  // ash
 
 #endif  //  ASH_ROOT_WINDOW_CONTROLLER_H_