Disable Quarantine tests on platforms its not supported.

content/common/quarantine/quarantine_unittest.cc

Index: content/common/quarantine/quarantine_unittest.cc
diff --git a/content/common/quarantine/quarantine_unittest.cc b/content/common/quarantine/quarantine_unittest.cc
index 9e4f3bc51b9e279308acd92b93876899abd77791..726aa292687b0226e99d5ade26601ebb20966124 100644
--- a/content/common/quarantine/quarantine_unittest.cc
+++ b/content/common/quarantine/quarantine_unittest.cc
@@ -26,6 +26,12 @@ 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());
 
@@ -43,6 +49,12 @@ TEST(QuarantineTest, FileCanBeOpenedForReadAfterAnnotation) {
 }
 
 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());