Disable Quarantine tests on platforms its not supported.

content/common/quarantine/quarantine_unittest.cc

 // Copyright 2016 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 "content/public/common/quarantine.h"
 
 #include <iterator>
 #include <string>
 
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace content {
 
 namespace {
 
 const char kTestData[] = "It's okay to have a trailing nul.";
 const char kInternetURL[] = "http://example.com/some-url";
 const char kInternetReferrerURL[] = "http://example.com/some-other-url";
 const char kTestGUID[] = "69f8621d-c46a-4e88-b915-1ce5415cb008";
 
 }  // namespace
 
 TEST(QuarantineTest, FileCanBeOpenedForReadAfterAnnotation) {
+  if (!IsQuarantineSupportedForTesting()) {
+      LOG(WARNING) << "Test will be skipped because quarantining is "
+                      "not supported on this OS/file system.";
+      return;
+  }
+
   base::ScopedTempDir test_dir;
   ASSERT_TRUE(test_dir.CreateUniqueTempDir());
 
   base::FilePath test_file = test_dir.GetPath().AppendASCII("foo.class");
   ASSERT_EQ(static_cast<int>(arraysize(kTestData)),
             base::WriteFile(test_file, kTestData, arraysize(kTestData)));
 
   EXPECT_EQ(QuarantineFileResult::OK,
             QuarantineFile(test_file, GURL(kInternetURL),
                            GURL(kInternetReferrerURL), kTestGUID));
 
   std::string contents;
   EXPECT_TRUE(base::ReadFileToString(test_file, &contents));
   EXPECT_EQ(std::string(std::begin(kTestData), std::end(kTestData)), contents);
 }
 
 TEST(QuarantineTest, FileCanBeAnnotatedWithNoGUID) {
+  if (!IsQuarantineSupportedForTesting()) {
+      LOG(WARNING) << "Test will be skipped because quarantining is "
+                      "not supported on this OS/file system.";
+      return;
+  }
+
   base::ScopedTempDir test_dir;
   ASSERT_TRUE(test_dir.CreateUniqueTempDir());
 
   base::FilePath test_file = test_dir.GetPath().AppendASCII("foo.class");
   ASSERT_EQ(static_cast<int>(arraysize(kTestData)),
             base::WriteFile(test_file, kTestData, arraysize(kTestData)));
 
   EXPECT_EQ(QuarantineFileResult::OK,
             QuarantineFile(test_file, GURL(kInternetURL),
                            GURL(kInternetReferrerURL), std::string()));
 }
 
 }  // namespace content