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..d8d311632e134d50bbbf6edf108a7839104597eb 100644
--- a/webkit/renderer/media/crypto/key_systems.cc
+++ b/webkit/renderer/media/crypto/key_systems.cc
@@ -160,4 +160,14 @@ 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 kKeySystemToUUIDMapping[i].uuid;
+  }
+  return std::vector<uint8>();
+}
+#endif  // defined(OS_ANDROID)
+
 }  // namespace webkit_media