Converts usage of SetProp/GetProp to a map. Even after making sure we

views/widget/child_window_message_processor.h

Index: views/widget/child_window_message_processor.h
diff --git a/views/widget/child_window_message_processor.h b/views/widget/child_window_message_processor.h
index 7d4e63e26f96f1d897c81428a8f159abe98d6b0d..3490864a2a44859525556ec717f1e74f29973bc4 100644
--- a/views/widget/child_window_message_processor.h
+++ b/views/widget/child_window_message_processor.h
@@ -9,9 +9,7 @@
 #include <windows.h>
 
 namespace app {
-namespace win {
-class ScopedProp;
-}
+class ViewProp;
 }
 
 namespace views {
@@ -25,8 +23,8 @@ class ChildWindowMessageProcessor {
  public:
   // Registers |processor| for |hwnd|. The caller takes ownership of the
   // returned object.
-  static app::win::ScopedProp* Register(HWND hwnd,
-                                        ChildWindowMessageProcessor* processor);
+  static app::ViewProp* Register(HWND hwnd,
+                                 ChildWindowMessageProcessor* processor);
 
   // Returns the ChildWindowMessageProcessor for |hwnd|, NULL if there isn't
   // one.