Rewrite most of the scopers in //base/mac to use ScopedTypeRef or ScopedGeneric.

base/mac/scoped_cffiledescriptorref.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
 #define BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
 
 #include <CoreFoundation/CoreFoundation.h>
 
-#include "base/compiler_specific.h"
-#include "base/macros.h"
+#include "base/scoped_generic.h"
 
 namespace base {
 namespace mac {
 
+namespace internal {
+
+struct ScopedCFFileDescriptorRefTraits {
+  static CFFileDescriptorRef InvalidValue() { return nullptr; }
+  static void Free(CFFileDescriptorRef ref) {
+    CFFileDescriptorInvalidate(ref);
+    CFRelease(ref);
+  }
+};
+
+}  // namespace internal
+
 // ScopedCFFileDescriptorRef is designed after ScopedCFTypeRef<>. On
 // destruction, it will invalidate the file descriptor.
 // ScopedCFFileDescriptorRef (unlike ScopedCFTypeRef<>) does not support RETAIN
 // semantics, copying, or assignment, as doing so would increase the chances
 // that a file descriptor is invalidated while still in use.
-class ScopedCFFileDescriptorRef {
- public:
-  explicit ScopedCFFileDescriptorRef(CFFileDescriptorRef fdref = NULL)
-      : fdref_(fdref) {
-  }
-
-  ~ScopedCFFileDescriptorRef() {
-    if (fdref_) {
-      CFFileDescriptorInvalidate(fdref_);
-      CFRelease(fdref_);
-    }
-  }
-
-  void reset(CFFileDescriptorRef fdref = NULL) {
-    if (fdref_ == fdref)
-      return;
-    if (fdref_) {
-      CFFileDescriptorInvalidate(fdref_);
-      CFRelease(fdref_);
-    }
-    fdref_ = fdref;
-  }
-
-  bool operator==(CFFileDescriptorRef that) const {
-    return fdref_ == that;
-  }
-
-  bool operator!=(CFFileDescriptorRef that) const {
-    return fdref_ != that;
-  }
-
-  operator CFFileDescriptorRef() const {
-    return fdref_;
-  }
-
-  CFFileDescriptorRef get() const {
-    return fdref_;
-  }
-
-  CFFileDescriptorRef release() WARN_UNUSED_RESULT {
-    CFFileDescriptorRef temp = fdref_;
-    fdref_ = NULL;
-    return temp;
-  }
-
- private:
-  CFFileDescriptorRef fdref_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedCFFileDescriptorRef);
-};
+using ScopedCFFileDescriptorRef =
+    ScopedGeneric<CFFileDescriptorRef,
+                  internal::ScopedCFFileDescriptorRefTraits>;
 
 }  // namespace mac
 }  // namespace base
 
 #endif  // BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_