Make panel adjust bounds per preferred size change notification on Windows.

chrome/browser/ui/panels/panel_manager.h

Index: chrome/browser/ui/panels/panel_manager.h
===================================================================
--- chrome/browser/ui/panels/panel_manager.h	(revision 94932)
+++ chrome/browser/ui/panels/panel_manager.h	(working copy)
@@ -38,6 +38,9 @@
   void Drag(int delta_x);
   void EndDragging(bool cancelled);
 
+  // Updates the bounds of the given panel as the preferred size gets changed.
+  void UpdatePreferredSize(Panel* panel, const gfx::Size& pref_size);
+
   // Should we bring up the titlebar, given the current mouse point?
   bool ShouldBringUpTitleBarForAllMinimizedPanels(int mouse_x,
                                                   int mouse_y) const;
@@ -83,6 +86,10 @@
   void DragLeft();
   void DragRight();
 
+  // Updates the maximum size of each panel as the result of adding, removing,
+  // or sizing panels.
+  void UpdateMaximumSizeForAllPanels();
+
   Panels panels_;
 
   // Stores the panels that are pending to remove. We want to delay the removal