Move some files in base to base/memory.

base/observer_list_threadsafe.h

Index: base/observer_list_threadsafe.h
diff --git a/base/observer_list_threadsafe.h b/base/observer_list_threadsafe.h
index 47a662ea0b84c8a719a8f55a1685f58a64112ffd..f1ff5b02d841d6a3a1f9ef9fd58708da8a740410 100644
--- a/base/observer_list_threadsafe.h
+++ b/base/observer_list_threadsafe.h
@@ -12,9 +12,9 @@
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/logging.h"
+#include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/observer_list.h"
-#include "base/ref_counted.h"
 #include "base/task.h"
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -57,7 +57,7 @@ class ObserverListThreadSafe;
 // This class is used to work around VS2005 not accepting:
 //
 // friend class
-//     base::RefCountedThreadSafe<ObserverListThreadSafe<ObserverType> >;
+//    base::RefCountedThreadSafe<ObserverListThreadSafe<ObserverType> >;
 //
 // Instead of friending the class, we could friend the actual function
 // which calls delete.  However, this ends up being