devtools: Make it possible to override the navigation referrer

content/browser/devtools/protocol/devtools_protocol_browsertest.cc

 // 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 <stddef.h>
 #include <utility>
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 1633 matching lines @@
       EXPECT_TRUE(cookie->GetString("value", &value));
       EXPECT_EQ("polyglottal", value);
       found++;
     } else {
       FAIL();
     }
   }
   EXPECT_EQ(2u, found);
 }
 
+IN_PROC_BROWSER_TEST_F(DevToolsProtocolTest, SetNavigationReferrer) {
+  ASSERT_TRUE(embedded_test_server()->Start());

[pfeldman, 2017/02/21 18:47:30]

Why not inspector protocol test?

[Sami, 2017/02/22 16:01:58]

Done. (Although it ended up being a little involved because of how navigations
work in the protocol tests.)

+  NavigateToURLBlockUntilNavigationsComplete(shell(), GURL("about:blank"), 1);
+  Attach();
+  SendCommand("Network.enable", nullptr, false);
+  SendCommand("Page.enable", nullptr, false);
+
+  std::unique_ptr<base::DictionaryValue> params(new base::DictionaryValue());
+  GURL test_url =
+      embedded_test_server()->GetURL("/devtools/referrer/referrer.html");
+  GURL referrer_url("http://example.com");
+  params->SetString("url", test_url.spec());
+  params->SetString("referrer", referrer_url.spec());
+  SendCommand("Page.navigate", std::move(params), true);
+
+  // We should see two resources being requested: firstly the main page (which
+  // should use our custom referrer) and secondly the embedded image (whose
+  // referrer should be the main page).
+  std::string url;
+  std::string referrer;
+  base::DictionaryValue* request_params;
+  base::DictionaryValue* request_headers;
+  params = WaitForNotification("Network.requestWillBeSent", true);
+  ASSERT_TRUE(params->GetDictionary("request", &request_params));
+  ASSERT_TRUE(request_params->GetDictionary("headers", &request_headers));
+  EXPECT_TRUE(request_params->GetString("url", &url));
+  EXPECT_TRUE(request_headers->GetString("Referer", &referrer));
+  EXPECT_EQ(test_url.spec(), url);
+  EXPECT_EQ(referrer_url.spec(), referrer);
+
+  params = WaitForNotification("Network.requestWillBeSent", true);
+  GURL image_url =
+      embedded_test_server()->GetURL("/devtools/referrer/image.png");
+  ASSERT_TRUE(params->GetDictionary("request", &request_params));
+  ASSERT_TRUE(request_params->GetDictionary("headers", &request_headers));
+  EXPECT_TRUE(request_params->GetString("url", &url));
+  EXPECT_TRUE(request_headers->GetString("Referer", &referrer));
+  EXPECT_EQ(image_url.spec(), url);
+  EXPECT_EQ(test_url.spec(), referrer);
+}
+
 }  // namespace content