Send navigation_start to the browser in DidStartProvisionalLoad IPC

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 5d5be241a5313fcd6746e3a5ef53567fe924970e..0bdece2863c1f2b2ad52f43bf5e818d8a361f86d 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -804,9 +804,11 @@ void RenderFrameHostImpl::OnDocumentOnLoadCompleted(
   delegate_->DocumentOnLoadCompleted(this);
 }
 
-void RenderFrameHostImpl::OnDidStartProvisionalLoadForFrame(const GURL& url) {
-  frame_tree_node_->navigator()->DidStartProvisionalLoad(
-      this, url);
+void RenderFrameHostImpl::OnDidStartProvisionalLoadForFrame(
+    const GURL& url,
+    const base::TimeTicks& navigation_start) {
+  frame_tree_node_->navigator()->DidStartProvisionalLoad(this, url,
+                                                         navigation_start);
 }
 
 void RenderFrameHostImpl::OnDidFailProvisionalLoadWithError(
@@ -946,7 +948,7 @@ void RenderFrameHostImpl::OnDidCommitProvisionalLoad(const IPC::Message& msg) {
   // message.
   if (!navigation_handle_) {
     navigation_handle_ = NavigationHandleImpl::Create(
-        validated_params.url, frame_tree_node_);
+        validated_params.url, frame_tree_node_, base::TimeTicks::Now());

[nasko, 2015/11/13 21:52:54]

Why not the actual start time from the renderer process?

[Charlie Harrison, 2015/11/14 00:25:00]

We discussed this briefly over email, but I think to track same-page navigations
like this from the renderer, we would need to send the timestamp on commit IPCs
as well as provisional. Since these navigations are less important, I figured
that adding this additional timestamp and complexity would not be worth it until
a consumer wanted it.

   }
 
   accessibility_reset_count_ = 0;