Fixing problem with edge swipe exiting immersive mode

ash/wm/window_state.h

Index: ash/wm/window_state.h
diff --git a/ash/wm/window_state.h b/ash/wm/window_state.h
index 4ce47fdd275de07c806862b87139820d1d12b208..f9bfc534bf533d6c065ffeb7a29a0a41d1ca85d4 100644
--- a/ash/wm/window_state.h
+++ b/ash/wm/window_state.h
@@ -267,6 +267,17 @@ class ASH_EXPORT WindowState : public aura::WindowObserver {
     top_row_keys_are_function_keys_ = value;
   }
 
+  // True if the window is in "immersive full screen mode" which is slightly
+  // different from the normal fullscreen mode by allowing the user to reveal
+  // the top portion of the window through a touch / mouse gesture. It will also
+  // allow the shelf to be shown.

[pkotwicz, 2014/06/02 22:27:58]

The part about "It will also allow the shelf to be shown" is not necessarily
true.

It is untrue if a window is in both immersive fullscreen and HTML 5 fullscreen.

[Mr4D (OOO till 08-26), 2014/06/03 14:36:40]

I am not sure if the full immersive functionality should be explained here. As
such I tried to keep this as brief as possible from the beginning. If someone is
interested in the full and actual state of immersive fullscreen he/she should
look at the explanations there. This is especially true since functionality
changes and a duplication of comments is dangerous like a duplication of code.
(I doubt that this comment would be updated). Nevertheless - I changed the
comment slightly again keeping it vague.

+  bool in_immersive_fullscreen() const {
+    return in_immersive_fullscreen_;
+  }
+  void set_in_immersive_fullscreen(bool enable) {
+    in_immersive_fullscreen_ = enable;
+  }
+
   // Creates and takes ownership of a pointer to DragDetails when resizing is
   // active. This should be done before a resizer gets created.
   void CreateDragDetails(aura::Window* window,
@@ -339,6 +350,7 @@ class ASH_EXPORT WindowState : public aura::WindowObserver {
   bool ignored_by_shelf_;
   bool can_consume_system_keys_;
   bool top_row_keys_are_function_keys_;
+  bool in_immersive_fullscreen_;
   scoped_ptr<DragDetails> drag_details_;
 
   bool unminimize_to_restore_bounds_;