Add a function to convert key system into UUID

webkit/renderer/media/crypto/key_systems_unittest.cc

Index: webkit/renderer/media/crypto/key_systems_unittest.cc
diff --git a/webkit/renderer/media/crypto/key_systems_unittest.cc b/webkit/renderer/media/crypto/key_systems_unittest.cc
index efd318d79463a85d2d97af53aae431c742414924..2eb4c27c978997dae8273a135a83ce862019bcb0 100644
--- a/webkit/renderer/media/crypto/key_systems_unittest.cc
+++ b/webkit/renderer/media/crypto/key_systems_unittest.cc
@@ -753,4 +753,18 @@ TEST_F(KeySystemsTest, IsSupportedKeySystemWithMediaMimeType_Widevine_MP4) {
       "audio/mp4", vorbis_codec(), kWidevineAlpha));
 }
 
+TEST_F(KeySystemsTest, ConvertKeySystemToUUID) {
+  // Currently only widevine is supported.

[ddorwin, 2013/06/20 03:07:27]

You probably don't need this comment, and it could get out of date.

[qinmin, 2013/06/20 17:41:53]

Done.

+  std::vector<uint8> uuid = ConvertKeySystemToAndroidUUID(kWidevineAlpha);
+  EXPECT_EQ(16u, uuid.size());
+
+  // Fail on all other key systems.
+  uuid = ConvertKeySystemToAndroidUUID(kWidevine);
+  EXPECT_EQ(0u, uuid.size());
+  uuid = ConvertKeySystemToAndroidUUID(kClearKey);
+  EXPECT_EQ(0u, uuid.size());
+  uuid = ConvertKeySystemToAndroidUUID("");
+  EXPECT_EQ(0u, uuid.size());
+}
+
 }  // namespace webkit_media