Do not issue preflight for crossorigin media resource loads.

content/renderer/media/android/media_info_loader.cc

Index: content/renderer/media/android/media_info_loader.cc
diff --git a/content/renderer/media/android/media_info_loader.cc b/content/renderer/media/android/media_info_loader.cc
index 167de7ce89303543f789c59ddd80a4ff2e01f883..ea93304f8c39371717cc63eb077fa7e1004553c8 100644
--- a/content/renderer/media/android/media_info_loader.cc
+++ b/content/renderer/media/android/media_info_loader.cc
@@ -58,6 +58,8 @@ void MediaInfoLoader::Start(blink::WebFrame* frame) {
           WebURLLoaderOptions::CrossOriginRequestPolicyAllow;
     } else {
       options.exposeAllResponseHeaders = true;
+      // The author header set is empty, no preflight should go ahead.
+      options.preflightPolicy = WebURLLoaderOptions::PreventPreflight;
       options.crossOriginRequestPolicy =
           WebURLLoaderOptions::CrossOriginRequestPolicyUseAccessControl;
       if (cors_mode_ == blink::WebMediaPlayer::CORSModeUseCredentials)