Add referrer & load flag support to BitmapFetcher class.

content/public/common/referrer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_COMMON_REFERRER_H_
 #define CONTENT_PUBLIC_COMMON_REFERRER_H_
 
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "url/gurl.h"
 
 namespace content {
 
 // This struct holds a referrer URL, as well as the referrer policy to be
 // applied to this URL. When passing around referrers that will eventually end
 // up being used for URL requests, always use this struct.
-struct CONTENT_EXPORT Referrer {
+class CONTENT_EXPORT Referrer {
+ public:
   Referrer(const GURL& url, blink::WebReferrerPolicy policy) : url(url),
-                                                                policy(policy) {
+                                                               policy(policy) {
   }
   Referrer() : policy(blink::WebReferrerPolicyDefault) {
   }
 
+  GURL ReferrerHeaderUrlForNavigation(const GURL& destination) const;
+
+  // TODO(kkimlabs): Make private, make getter & setter, and rename, e.g., url_.

[Kibeom Kim (inactive), 2014/04/30 00:58:56]

I'll do this for the next patchset if making Referrer struct -> class is ok.

   GURL url;
   blink::WebReferrerPolicy policy;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_REFERRER_H_