WIP - loop in LayoutManager for preferred size changes (2)

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 9447364529732256dfdb4f70f68384a7b56785d7..dc7485c9dd4f8c3a0deb9f5a09db137b7ed8b5d6 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -15,6 +15,7 @@
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "build/build_config.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/base/accessibility/accessibility_types.h"
@@ -975,11 +976,11 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // Size and disposition ------------------------------------------------------
 
   // Override to be notified when the bounds of the view have changed.
-  virtual void OnBoundsChanged(const gfx::Rect& previous_bounds);
+  virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) {}
 
   // Called when the preferred size of a child view changed.  This gives the
   // parent an opportunity to do a fresh layout if that makes sense.
-  virtual void ChildPreferredSizeChanged(View* child) {}
+  virtual void ChildPreferredSizeChanged(View* child);
 
   // Called when the visibility of a child view changed.  This gives the parent
   // an opportunity to do a fresh layout if that makes sense.
@@ -1198,6 +1199,7 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   friend class internal::PostEventDispatchHandler;
   friend class internal::RootView;
   friend class FocusManager;
+  friend class LayoutManager;
   friend class Widget;
 
   // Painting  -----------------------------------------------------------------
@@ -1258,6 +1260,9 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
 
   // Size and disposition ------------------------------------------------------
 
+  // FIXME
+  void LayoutIfNeeded();
+
   // Call VisibilityChanged() recursively for all children.
   void PropagateVisibilityNotifications(View* from, bool is_visible);
 
@@ -1394,6 +1399,7 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
               const gfx::Point& press_pt,
               ui::DragDropTypes::DragEventSource source);
 
+
   //////////////////////////////////////////////////////////////////////////////
 
   // Creation and lifetime -----------------------------------------------------
@@ -1402,6 +1408,8 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // parent during its parents destruction. False is the default.
   bool owned_by_client_;
 
+  base::WeakPtrFactory<View> weak_ptr_factory_;
+
   // Attributes ----------------------------------------------------------------
 
   // The id of this View. Used to find this View.