Convert Pass()→std::move() in //net

net/disk_cache/blockfile/file_posix.cc

Index: net/disk_cache/blockfile/file_posix.cc
diff --git a/net/disk_cache/blockfile/file_posix.cc b/net/disk_cache/blockfile/file_posix.cc
index 26067fb0436dc4b430dd674b8501809d41302a73..5a3ad455478f65cd844a6c49ca28c1e1e36cb45f 100644
--- a/net/disk_cache/blockfile/file_posix.cc
+++ b/net/disk_cache/blockfile/file_posix.cc
@@ -5,8 +5,8 @@
 #include "net/disk_cache/blockfile/file.h"
 
 #include <stdint.h>
-
 #include <limits>
+#include <utility>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
@@ -39,10 +39,7 @@ base::LazyInstance<FileWorkerPool>::Leaky s_worker_pool =
 namespace disk_cache {
 
 File::File(base::File file)
-    : init_(true),
-      mixed_(true),
-      base_file_(file.Pass()) {
-}
+    : init_(true), mixed_(true), base_file_(std::move(file)) {}
 
 bool File::Init(const base::FilePath& name) {
   if (base_file_.IsValid())