Allow updating arc widget bounds in maximize/fullscreen state.

ash/common/wm/window_state.h

Index: ash/common/wm/window_state.h
diff --git a/ash/common/wm/window_state.h b/ash/common/wm/window_state.h
index db48217669be7f998a799680a29f15644cfdce66..be657b558e2bb71ba6379c553fc5c98286e1303b 100644
--- a/ash/common/wm/window_state.h
+++ b/ash/common/wm/window_state.h
@@ -289,6 +289,15 @@ class ASH_EXPORT WindowState {
     ignore_keyboard_bounds_change_ = ignore_keyboard_bounds_change;
   }
 
+  // True if the window's bounds can be updated using SET_BOUNDS event in
+  // maiximzed/fullscreen mode.
+  void set_allow_set_bounds_in_maximized(bool value) {
+    allow_set_bounds_in_maximized_ = true;

[reveman, 2016/08/11 19:07:25]

"allow_set_bounds_in_maximized_ = value;" ?

[oshima, 2016/08/11 20:58:56]

Oops, thanks for the catch. Done and added test case for this.

+  }
+  bool allow_set_bounds_in_maximized() const {
+    return allow_set_bounds_in_maximized_;
+  }
+
   // Creates and takes ownership of a pointer to DragDetails when resizing is
   // active. This should be done before a resizer gets created.
   void CreateDragDetails(const gfx::Point& point_in_parent,
@@ -375,6 +384,7 @@ class ASH_EXPORT WindowState {
   bool minimum_visibility_;
   bool can_be_dragged_;
   bool cached_always_on_top_;
+  bool allow_set_bounds_in_maximized_ = false;

[reveman, 2016/08/11 19:07:25]

it's a bit confusing that this is false by default. so normal chrome app window
bounds can't be updated?

[oshima, 2016/08/11 20:58:56]

Maximized state means it's always maximized to its maximum size. Setting bounds
results in updating restore bounds in normal case and will be used when
restored. If an app wants to change the bounds, then it should restore first. 

On second thought, I think we should do this only for arc apps because this
behavior is very specific to arc apps (landscape/portrait). I changed to set
this only when application id is set.

 
   // A property to remember the window position which was set before the
   // auto window position manager changed the window bounds, so that it can get