Adds USB writing for OS X.

chrome/common/extensions/image_writer/image_writer_test_util_mac.h

Index: chrome/common/extensions/image_writer/image_writer_test_util_mac.h
diff --git a/chrome/common/extensions/image_writer/image_writer_test_util_mac.h b/chrome/common/extensions/image_writer/image_writer_test_util_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..83c75ed705bd2f0d9acda0072584950b83b87be5
--- /dev/null
+++ b/chrome/common/extensions/image_writer/image_writer_test_util_mac.h
@@ -0,0 +1,36 @@
+// Copyright 2014 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 CHROME_COMMON_EXTENSIONS_IMAGE_WRITER_IMAGE_WRITER_TEST_UTIL_MAC_H_
+#define CHROME_COMMON_EXTENSIONS_IMAGE_WRITER_IMAGE_WRITER_TEST_UTIL_MAC_H_
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <IOKit/storage/IOStorageProtocolCharacteristics.h>
+
+#include "base/mac/foundation_util.h"
+#include "base/strings/sys_string_conversions.h"
+
+namespace extensions {
+namespace image_writer {
+
+// The different types of disks we want to configure.
+typedef enum DriveType {

[Robert Sesek, 2014/06/10 19:47:46]

In C++, just |enum DriveType| is enough to declare a type.

[Drew Haven, 2014/06/12 02:24:26]

Done.  Bad habit.

+  FIXED,
+  USB,
+  SD,
+  CD,
+} DriveType;
+
+// Creates a disk-description dictionary.
+base::ScopedCFTypeRef<CFDictionaryRef> CreateDiskDictionary(
+    const std::string& bsd_name,
+    const std::string& vendor,
+    const std::string& model,
+    int64 capacity,
+    DriveType type);
+
+}  // image_writer
+}  // extensions
+
+#endif  // CHROME_COMMON_EXTENSIONS_IMAGE_WRITER_IMAGE_WRITER_TEST_UTIL_H_