Send navigation_start to the browser in DidStartProvisionalLoad IPC

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 6f08693d2fbfb13d5200a140879e5bc08bda2b4b..c1274ff74255d3cb38efee307af87e96cc380c70 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -2718,6 +2718,8 @@ void RenderFrameImpl::didStartProvisionalLoad(blink::WebLocalFrame* frame,
   // Start time is only set after request time.
   document_state->set_start_load_time(Time::Now());
 
+  NavigationStateImpl* navigation_state = static_cast<NavigationStateImpl*>(
+      document_state->navigation_state());
   bool is_top_most = !frame->parent();
   if (is_top_most) {
     render_view_->set_navigation_gesture(
@@ -2727,16 +2729,19 @@ void RenderFrameImpl::didStartProvisionalLoad(blink::WebLocalFrame* frame,
     // Subframe navigations that don't add session history items must be
     // marked with AUTO_SUBFRAME. See also didFailProvisionalLoad for how we
     // handle loading of error pages.
-    static_cast<NavigationStateImpl*>(document_state->navigation_state())
-        ->set_transition_type(ui::PAGE_TRANSITION_AUTO_SUBFRAME);
+    navigation_state->set_transition_type(ui::PAGE_TRANSITION_AUTO_SUBFRAME);
   }
 
+  base::TimeTicks navigation_start =
+      navigation_state->common_params().navigation_start;
+  DCHECK(!navigation_start.is_null());
+
   FOR_EACH_OBSERVER(RenderViewObserver, render_view_->observers(),
                     DidStartProvisionalLoad(frame));
   FOR_EACH_OBSERVER(RenderFrameObserver, observers_, DidStartProvisionalLoad());
 
   Send(new FrameHostMsg_DidStartProvisionalLoadForFrame(
-       routing_id_, ds->request().url()));
+       routing_id_, ds->request().url(), navigation_start));
 }
 
 void RenderFrameImpl::didReceiveServerRedirectForProvisionalLoad(
@@ -4343,7 +4348,7 @@ void RenderFrameImpl::OnFailedNavigation(
   // Inform the browser of the start of the provisional load. This is needed so
   // that the load is properly tracked by the WebNavigation API.
   Send(new FrameHostMsg_DidStartProvisionalLoadForFrame(
-      routing_id_, common_params.url));
+      routing_id_, common_params.url, common_params.navigation_start));
 
   // Send the provisional load failure.
   blink::WebURLError error =