Get mouse events to work with win aura, and make the combobox function in the views examples app.

ui/views/widget/desktop_root_window_host.h

Index: ui/views/widget/desktop_root_window_host.h
===================================================================
--- ui/views/widget/desktop_root_window_host.h	(revision 156204)
+++ ui/views/widget/desktop_root_window_host.h	(working copy)
@@ -9,6 +9,7 @@
 #include "ui/views/widget/widget.h"
 
 namespace aura {
+class RootWindowHost;
 class Window;
 }
 
@@ -32,7 +33,16 @@
   virtual void Init(aura::Window* content_window,
                     const Widget::InitParams& params) = 0;
 
+  virtual void Close() = 0;
+  virtual void CloseNow() = 0;
+
+  virtual aura::RootWindowHost* AsRootWindowHost() = 0;
+
   virtual void ShowWindowWithState(ui::WindowShowState show_state) = 0;
+
+  virtual bool IsVisible() const = 0;
+
+  virtual gfx::Rect GetClientAreaBoundsInScreen() const = 0;
 };
 
 }  // namespace views