base::Bind: Convert FileUtilProxy::CreateTemporaryCallback.

base/file_util_proxy.h

Index: base/file_util_proxy.h
diff --git a/base/file_util_proxy.h b/base/file_util_proxy.h
index 808c60e03fc1e9b0ee3bf3b1a4062d504c12cb73..196043a15c641082d4a1f8d55aacc1e94352a953 100644
--- a/base/file_util_proxy.h
+++ b/base/file_util_proxy.h
@@ -42,9 +42,9 @@ class BASE_EXPORT FileUtilProxy {
   typedef base::Callback<void(PlatformFileError /* error code */,
                               PassPlatformFile,
                               bool /* created */)> CreateOrOpenCallback;
-  typedef Callback3<PlatformFileError /* error code */,
-                    PassPlatformFile,
-                    FilePath>::Type CreateTemporaryCallback;
+  typedef base::Callback<void(PlatformFileError /* error code */,
+                              PassPlatformFile,
+                              FilePath)> CreateTemporaryCallback;
   typedef Callback2<PlatformFileError /* error code */,
                     bool /* created */>::Type EnsureFileExistsCallback;
   typedef Callback2<PlatformFileError /* error code */,
@@ -80,7 +80,7 @@ class BASE_EXPORT FileUtilProxy {
   static bool CreateTemporary(
       scoped_refptr<MessageLoopProxy> message_loop_proxy,
       int additional_file_flags,
-      CreateTemporaryCallback* callback);
+      const CreateTemporaryCallback& callback);
 
   // Close the given file handle.
   static bool Close(scoped_refptr<MessageLoopProxy> message_loop_proxy,