WIP - Refactor programmatic downloads

content/browser/net/referrer.cc

Index: content/browser/net/referrer.cc
diff --git a/content/browser/net/referrer.cc b/content/browser/net/referrer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..af10724f8a2cb1577546dd7b67178aa2349828a7
--- /dev/null
+++ b/content/browser/net/referrer.cc
@@ -0,0 +1,38 @@
+// Copyright 2013 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.
+
+#include "content/browser/net/referrer.h"
+
+#include "base/command_line.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/common/referrer.h"
+#include "net/url_request/url_request.h"
+
+namespace content {
+
+void SetReferrerForRequest(net::URLRequest* request, const Referrer& referrer) {
+  if (!referrer.url.is_valid() ||
+      CommandLine::ForCurrentProcess()->HasSwitch(switches::kNoReferrers)) {
+    request->SetReferrer(std::string());
+  } else {
+    request->SetReferrer(referrer.url.spec());
+  }
+
+  net::URLRequest::ReferrerPolicy net_referrer_policy =
+      net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE;
+  switch (referrer.policy) {
+    case WebKit::WebReferrerPolicyDefault:
+      net_referrer_policy =
+          net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE;
+      break;
+    case WebKit::WebReferrerPolicyAlways:
+    case WebKit::WebReferrerPolicyNever:
+    case WebKit::WebReferrerPolicyOrigin:
+      net_referrer_policy = net::URLRequest::NEVER_CLEAR_REFERRER;
+      break;
+  }
+  request->set_referrer_policy(net_referrer_policy);
+}
+
+}  // namespace content