Delay generation of User-Agent header to URLRequestHttpJob and accept custom User-Agent from XHR/Fe…

third_party/WebKit/public/platform/WebURLRequest.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 184 matching lines @@
     BLINK_PLATFORM_EXPORT void setHTTPMethod(const WebString&);
 
     BLINK_PLATFORM_EXPORT WebString httpHeaderField(const WebString& name) const;
     // It's not possible to set the referrer header using this method. Use setHTTPReferrer instead.
     BLINK_PLATFORM_EXPORT void setHTTPHeaderField(const WebString& name, const WebString& value);
     BLINK_PLATFORM_EXPORT void setHTTPReferrer(const WebString& referrer, WebReferrerPolicy);
     BLINK_PLATFORM_EXPORT void addHTTPHeaderField(const WebString& name, const WebString& value);
     BLINK_PLATFORM_EXPORT void clearHTTPHeaderField(const WebString& name);
     BLINK_PLATFORM_EXPORT void visitHTTPHeaderFields(WebHTTPHeaderVisitor*) const;
 
+    BLINK_PLATFORM_EXPORT WebString defaultHTTPUserAgent() const;
+
     BLINK_PLATFORM_EXPORT WebHTTPBody httpBody() const;
     BLINK_PLATFORM_EXPORT void setHTTPBody(const WebHTTPBody&);
 
     BLINK_PLATFORM_EXPORT WebHTTPBody attachedCredential() const;
     BLINK_PLATFORM_EXPORT void setAttachedCredential(const WebHTTPBody&);
 
     // Controls whether upload progress events are generated when a request
     // has a body.
     BLINK_PLATFORM_EXPORT bool reportUploadProgress() const;
     BLINK_PLATFORM_EXPORT void setReportUploadProgress(bool);
@@ skipping 116 matching lines @@
     // instance it contains.
     std::unique_ptr<ResourceRequestContainer> m_ownedResourceRequest;
 
     // Should never be null.
     ResourceRequest* m_resourceRequest;
 };
 
 } // namespace blink
 
 #endif