Changes error code to NotFoundError.

chrome/browser/media/router/presentation_service_delegate_impl.cc

Index: chrome/browser/media/router/presentation_service_delegate_impl.cc
diff --git a/chrome/browser/media/router/presentation_service_delegate_impl.cc b/chrome/browser/media/router/presentation_service_delegate_impl.cc
index 15568577e3fdf7ea7c9575db6b32ca18eb0d5690..67d43a3280846e406484955230cfa8b30adb6c65 100644
--- a/chrome/browser/media/router/presentation_service_delegate_impl.cc
+++ b/chrome/browser/media/router/presentation_service_delegate_impl.cc
@@ -788,8 +788,9 @@ void PresentationServiceDelegateImpl::StartSession(
   if (presentation_urls.empty() ||
       std::find_if_not(presentation_urls.begin(), presentation_urls.end(),
                        IsValidPresentationUrl) != presentation_urls.end()) {
-    error_cb.Run(content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN,
-                                            "Invalid presentation URL."));
+    error_cb.Run(content::PresentationError(
+        content::PRESENTATION_ERROR_NO_PRESENTATION_FOUND,
+        "Invalid presentation URL."));
     return;
   }