Add a function to convert key system into UUID

webkit/renderer/media/crypto/key_systems.cc

Index: webkit/renderer/media/crypto/key_systems.cc
diff --git a/webkit/renderer/media/crypto/key_systems.cc b/webkit/renderer/media/crypto/key_systems.cc
index 161ec88e7e26aed6fa4236e10ac934e136573082..6ece643481589e5647b95353734333a3cfce97ae 100644
--- a/webkit/renderer/media/crypto/key_systems.cc
+++ b/webkit/renderer/media/crypto/key_systems.cc
@@ -160,4 +160,15 @@ std::string GetPepperType(const std::string& key_system) {
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)
 
+#if defined(OS_ANDROID)
+std::vector<uint8> GetUUID(const std::string& key_system) {
+  for (int i = 0; i < kNumKeySystemToUUIDMapping; ++i) {
+    if (kKeySystemToUUIDMapping[i].key_system == key_system)
+      return std::vector<uint8>(kKeySystemToUUIDMapping[i].uuid,
+                                kKeySystemToUUIDMapping[i].uuid + 16);
+  }
+  return std::vector<uint8>();
+}
+#endif  // defined(OS_ANDROID)
+
 }  // namespace webkit_media