Move scoped_temp_dir from base to base/files

remoting/host/host_key_pair_unittest.cc

Index: remoting/host/host_key_pair_unittest.cc
diff --git a/remoting/host/host_key_pair_unittest.cc b/remoting/host/host_key_pair_unittest.cc
index a90c1baaff49bd793b86d363e2993c93b125acb0..f19674f2ca5c82d5bbbff0f6aefd4d2f08a08f6e 100644
--- a/remoting/host/host_key_pair_unittest.cc
+++ b/remoting/host/host_key_pair_unittest.cc
@@ -4,10 +4,10 @@
 
 #include <string>
 
+#include "base/files/scoped_temp_dir.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
-#include "base/scoped_temp_dir.h"
 #include "base/string_util.h"
 #include "remoting/host/host_key_pair.h"
 #include "remoting/host/json_host_config.h"
@@ -38,7 +38,7 @@ class HostKeyPairTest : public testing::Test {
   }
 
   MessageLoop message_loop_;
-  ScopedTempDir test_dir_;
+  base::ScopedTempDir test_dir_;
   scoped_ptr<JsonHostConfig> config_;
 };