Adds USB writing for OS X.

chrome/common/extensions/image_writer/image_writer_util_mac_unittest.cc

+// 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.
+
+#include "chrome/common/extensions/image_writer/image_writer_test_util_mac.h"
+#include "chrome/common/extensions/image_writer/image_writer_util_mac.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace extensions {
+namespace image_writer {
+
+namespace {
+
+class ImageWriterTestUtilsTest : public testing::Test {};
+
+}  // namespace
+
+// Tests IsRemovableDevice.
+TEST_F(ImageWriterTestUtilsTest, DiskIsValidTarget) {

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

You can just use TEST(ImageWriterTestUtilsTest, DiskIsValidTarget) and remove
the subclass above.

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

Done.

+  base::ScopedCFTypeRef<CFDictionaryRef> fixed_disk = CreateDiskDictionary(
+      "disk0", "Fixed Vendor", "Fixed Model", (int64)1 << 40, DriveType::FIXED);
+  base::ScopedCFTypeRef<CFDictionaryRef> cd_drive =
+      CreateDiskDictionary("disk1", "CD Vendor", "CD Model", 0, DriveType::CD);
+  base::ScopedCFTypeRef<CFDictionaryRef> usb_stick = CreateDiskDictionary(
+      "disk2", "USB Vendor", "USB Model", (int64)1 << 32, DriveType::USB);
+  base::ScopedCFTypeRef<CFDictionaryRef> sd_card = CreateDiskDictionary(
+      "disk3", "SD Vendor", "SD Model", (int64)1 << 33, DriveType::SD);
+  ASSERT_FALSE(IsRemovableDevice(fixed_disk));
+  ASSERT_FALSE(IsRemovableDevice(cd_drive));
+  ASSERT_TRUE(IsRemovableDevice(usb_stick));
+  ASSERT_TRUE(IsRemovableDevice(sd_card));
+}
+
+}  // image_writer
+}  // extensions