[downloads] Set initiator when handling downloads via a[download]

content/browser/renderer_host/render_view_host_unittest.cc

 // 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.
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/child_process_security_policy_impl.h"
@@ skipping 265 matching lines @@
   void Test(const std::string& url) {
     OnMessageReceived(FrameHostMsg_SaveImageFromDataURL(0, 0, url));
   }
 
  protected:
   ~TestSaveImageFromDataURL() override {}
   void DownloadUrl(int render_view_id,
                    int render_frame_id,
                    const GURL& url,
                    const Referrer& referrer,
+                   const url::Origin& initiator,
                    const base::string16& suggested_name,
                    const bool use_prompt) const override {
     url_string_ = url.spec();
     is_downloaded_ = true;
   }
 
  private:
   mutable std::string url_string_;
   mutable bool is_downloaded_;
 };
@@ skipping 10 matching lines @@
   const std::string data_url = "data:image/gif;base64,"
       "R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=";
 
   tester->Reset();
   tester->Test(data_url);
   EXPECT_EQ(tester->UrlString(), data_url);
   EXPECT_TRUE(tester->IsDownloaded());
 }
 
 }  // namespace content