Move scoped_temp_dir from base to base/files

base/files/scoped_temp_dir.h

Index: base/files/scoped_temp_dir.h
diff --git a/base/scoped_temp_dir.h b/base/files/scoped_temp_dir.h
similarity index 92%
rename from base/scoped_temp_dir.h
rename to base/files/scoped_temp_dir.h
index 94acefcb16b01578b7419ebf8b3f5d4607df18dd..641e7ef7230893d03fc9b405259e60237fce584c 100644
--- a/base/scoped_temp_dir.h
+++ b/base/files/scoped_temp_dir.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef BASE_SCOPED_TEMP_DIR_H_
-#define BASE_SCOPED_TEMP_DIR_H_
+#ifndef BASE_FILES_SCOPED_TEMP_DIR_H_
+#define BASE_FILES_SCOPED_TEMP_DIR_H_
 
 // An object representing a temporary / scratch directory that should be cleaned
 // up (recursively) when this object goes out of scope.  Note that since
@@ -18,6 +18,8 @@
 #include "base/base_export.h"
 #include "base/file_path.h"
 
+namespace base {
+
 class BASE_EXPORT ScopedTempDir {
  public:
   // No directory is owned/created initially.
@@ -55,4 +57,6 @@ class BASE_EXPORT ScopedTempDir {
   DISALLOW_COPY_AND_ASSIGN(ScopedTempDir);
 };
 
-#endif  // BASE_SCOPED_TEMP_DIR_H_
+}  // namespace base
+
+#endif  // BASE_FILES_SCOPED_TEMP_DIR_H_