Implement transfer navigation with mojo

content/browser/loader/navigation_resource_throttle.cc

Index: content/browser/loader/navigation_resource_throttle.cc
diff --git a/content/browser/loader/navigation_resource_throttle.cc b/content/browser/loader/navigation_resource_throttle.cc
index e8f9e6ed25b47782c18c8d174c31ec3cc3f92e7e..41476b9e8af3b6394633005a8fff78dd396f5318 100644
--- a/content/browser/loader/navigation_resource_throttle.cc
+++ b/content/browser/loader/navigation_resource_throttle.cc
@@ -8,6 +8,7 @@
 
 #include "base/bind.h"
 #include "base/callback.h"
+#include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
@@ -179,12 +180,14 @@ void WillProcessResponseOnUIThread(
 NavigationResourceThrottle::NavigationResourceThrottle(
     net::URLRequest* request,
     ResourceDispatcherHostDelegate* resource_dispatcher_host_delegate,
-    RequestContextType request_context_type)
+    RequestContextType request_context_type,
+    const TransferCallback& on_transfer)
     : request_(request),
       resource_dispatcher_host_delegate_(resource_dispatcher_host_delegate),
       request_context_type_(request_context_type),
       in_cross_site_transition_(false),
       on_transfer_done_result_(NavigationThrottle::DEFER),
+      on_transfer_(on_transfer),
       weak_ptr_factory_(this) {}
 
 NavigationResourceThrottle::~NavigationResourceThrottle() {}
@@ -362,11 +365,18 @@ void NavigationResourceThrottle::InitiateTransfer() {
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
-void NavigationResourceThrottle::OnTransferComplete() {
+void NavigationResourceThrottle::OnTransferComplete(
+    mojom::URLLoaderAssociatedRequest mojo_request,
+    mojom::URLLoaderClientAssociatedPtr url_loader_client) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(in_cross_site_transition_);
   in_cross_site_transition_ = false;
 
+  if (on_transfer_) {

[clamy, 2016/11/21 17:55:54]

Could you dcheck this only happens when loading with mojo is activated?

+    base::ResetAndReturn(&on_transfer_)
+        .Run(std::move(mojo_request), std::move(url_loader_client));
+  }
+
   // If the results of the checks on the UI thread are known, unblock the
   // navigation. Otherwise, wait until the callback has executed.
   if (on_transfer_done_result_ != NavigationThrottle::DEFER) {