Move some files in base to base/memory.

base/memory/weak_ptr.h

Index: base/memory/weak_ptr.h
diff --git a/base/weak_ptr.h b/base/memory/weak_ptr.h
similarity index 98%
rename from base/weak_ptr.h
rename to base/memory/weak_ptr.h
index 60da03fa6e20a9c55a3406bece22c686cc83d797..5680966c0da60f49fb7ebc0e874b05261571fdf5 100644
--- a/base/weak_ptr.h
+++ b/base/memory/weak_ptr.h
@@ -48,12 +48,12 @@
 // WARNING: weak pointers are not threadsafe!!!  You must only use a WeakPtr
 // instance on thread where it was created.
 
-#ifndef BASE_WEAK_PTR_H_
-#define BASE_WEAK_PTR_H_
+#ifndef BASE_MEMORY_WEAK_PTR_H_
+#define BASE_MEMORY_WEAK_PTR_H_
 #pragma once
 
 #include "base/logging.h"
-#include "base/ref_counted.h"
+#include "base/memory/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
 
 namespace base {
@@ -242,4 +242,4 @@ class WeakPtrFactory {
 
 }  // namespace base
 
-#endif  // BASE_WEAK_PTR_H_
+#endif  // BASE_MEMORY_WEAK_PTR_H_