[chromecast] Forward UserData for extension redirects.

Need for eureka-internal/178533

Bug: internal b/110284450
Test: on device
Change-Id: I17482cbfa0d3812047714e648a1562a8cfe55be8
Reviewed-on: https://chromium-review.googlesource.com/1103671Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Reviewed-by: Paul Jensen <pauljensen@chromium.org>
Commit-Queue: Gaofeng Huang <gfhuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568430}

chromecast/browser/DEPS

@@ -21,6 +21,7 @@ include_rules = [
   "+components/version_info",
   "+components/viz/common/switches.h",
   "+components/zoom",
+  "+content/common/net",
   "+content/public/android",
   "+content/public/browser",
   "+content/public/common",

chromecast/browser/extension_request_protocol_handler.cc

@@ -5,6 +5,7 @@
 #include "chromecast/browser/extension_request_protocol_handler.h"
 
 #include "chromecast/common/cast_redirect_manifest_handler.h"
+#include "content/common/net/url_request_user_data.h"
 #include "extensions/browser/extension_protocols.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/info_map.h"
@@ -86,7 +87,15 @@ CastExtensionURLRequestJob::CastExtensionURLRequestJob(
     : net::URLRequestJob(request, network_delegate),
       sub_request_(request->context()->CreateRequest(redirect_url,
                                                      request->priority(),
-                                                     this)) {}
+                                                     this)) {
+  content::URLRequestUserData* user_data =
+      static_cast<content::URLRequestUserData*>(
+          request->GetUserData(content::URLRequestUserData::kUserDataKey));
+  sub_request_->SetUserData(
+      content::URLRequestUserData::kUserDataKey,
+      std::make_unique<content::URLRequestUserData>(
+          user_data->render_process_id(), user_data->render_frame_id()));
+}
 
 CastExtensionURLRequestJob::~CastExtensionURLRequestJob() {}