Make it possible to set the HTTP origin header from content

public/platform/WebURLRequest.h

Index: public/platform/WebURLRequest.h
diff --git a/public/platform/WebURLRequest.h b/public/platform/WebURLRequest.h
index 7d9e4dcda03fa69796189c4431bfee4229f30c29..0e65e80f99750704d611416bdc763a0dd5cb4178 100644
--- a/public/platform/WebURLRequest.h
+++ b/public/platform/WebURLRequest.h
@@ -159,6 +159,10 @@ public:
 
     BLINK_PLATFORM_EXPORT WebReferrerPolicy referrerPolicy() const;
 
+    // Adds an HTTP origin header if it is empty and the HTTP method of the
+    // request requires it.
+    BLINK_PLATFORM_EXPORT void addHTTPOriginIfNeeded(const WebString& origin);
+
     // True if the request was user initiated.
     BLINK_PLATFORM_EXPORT bool hasUserGesture() const;
     BLINK_PLATFORM_EXPORT void setHasUserGesture(bool);