Allow redirects for requests that require preflight.

third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h

Index: third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
diff --git a/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h b/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
index 06b19a11e48677a11f5e8b4f51323479101b944c..91193f737b4e294a5b069ce91a20dd8077052dd1 100644
--- a/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
+++ b/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
@@ -214,8 +214,6 @@ class CORE_EXPORT DocumentThreadableLoader final : public ThreadableLoader,
   // True while the initial URL and all the URLs of the redirects this object
   // has followed, if any, are same-origin to getSecurityOrigin().
   bool m_sameOriginRequest;
-  // Set to true if the current request is cross-origin and not simple.
-  bool m_crossOriginNonSimpleRequest;
 
   // Set to true when the response data is given to a data consumer handle.
   bool m_isUsingDataConsumerHandle;