Cleanup: move base/platform_test.h -> testing/

base/platform_test_mac.mm

Index: base/platform_test_mac.mm
diff --git a/base/platform_test_mac.mm b/base/platform_test_mac.mm
deleted file mode 100644
index f3802c145e889f430035a7c5542ccbab806b9b5b..0000000000000000000000000000000000000000
--- a/base/platform_test_mac.mm
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright (c) 2006-2008 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.
-
-#include "base/platform_test.h"
-
-#import <Foundation/Foundation.h>
-
-void PlatformTest::SetUp() {
-  pool_ = [[NSAutoreleasePool alloc] init];
-}
-
-void PlatformTest::TearDown() {
-  [pool_ drain];
-}