Pipe the devTools FrameId from blink into the browser for headless

headless/public/util/generic_url_request_job.cc

Index: headless/public/util/generic_url_request_job.cc
diff --git a/headless/public/util/generic_url_request_job.cc b/headless/public/util/generic_url_request_job.cc
index 4cf9bdd257cff27157b88b9279bd6988f9b5083d..8a78ac24a1b84614421b699f932730d719f754ce 100644
--- a/headless/public/util/generic_url_request_job.cc
+++ b/headless/public/util/generic_url_request_job.cc
@@ -12,6 +12,7 @@
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/browser/web_contents.h"
+#include "headless/public/headless_browser_context.h"
 #include "headless/public/util/url_request_dispatcher.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
@@ -42,13 +43,15 @@ GenericURLRequestJob::GenericURLRequestJob(
     net::NetworkDelegate* network_delegate,
     URLRequestDispatcher* url_request_dispatcher,
     std::unique_ptr<URLFetcher> url_fetcher,
-    Delegate* delegate)
+    Delegate* delegate,
+    HeadlessBrowserContext* headless_browser_context)
     : ManagedDispatchURLRequestJob(request,
                                    network_delegate,
                                    url_request_dispatcher),
       url_fetcher_(std::move(url_fetcher)),
       origin_task_runner_(base::ThreadTaskRunnerHandle::Get()),
       delegate_(delegate),
+      headless_browser_context_(headless_browser_context),
       request_resource_info_(
           content::ResourceRequestInfo::ForRequest(request_)),
       request_id_(next_request_id_++),
@@ -199,7 +202,13 @@ int GenericURLRequestJob::GetFrameTreeNodeId() const {
   int render_process_id;
   int render_frame_id;
   if (content::ResourceRequestInfo::GetRenderFrameForRequest(
-          request_, &render_process_id, &render_frame_id)) {
+          request_, &render_process_id, &render_frame_id) &&
+      render_process_id != -1) {
+    if (headless_browser_context_) {
+      return headless_browser_context_->GetFrameTreeNodeId(render_process_id,
+                                                           render_frame_id);
+    }
+    // TODO(alexclarke): Remove this.
     content::RenderFrameHost* render_frame_host =
         content::RenderFrameHost::FromID(render_process_id, render_frame_id);
     DCHECK(render_frame_host);