Correctly record and pass around navigation start time.

components/web_view/public/interfaces/frame.mojom

Index: components/web_view/public/interfaces/frame.mojom
diff --git a/components/web_view/public/interfaces/frame.mojom b/components/web_view/public/interfaces/frame.mojom
index ffe1f8f933dabb160440726605bb44f7ab318e58..4c8587953d2d2ce239d02b2d171c86d1350d4f29 100644
--- a/components/web_view/public/interfaces/frame.mojom
+++ b/components/web_view/public/interfaces/frame.mojom
@@ -134,12 +134,15 @@ interface FrameClient {
   // Called once per client. |frame_data| gives the contents of the tree.
   // |view_id| is the id of the view the FrameClient should render to. If a
   // ViewTreeClient is asked for then |view_id| is the same id as that of the
-  // View supplied to ViewTreeClient::OnEmbed().
+  // View supplied to ViewTreeClient::OnEmbed(). |navigation_start_time_ticks|
+  // is the time when the navigation resulting in this OnConnect() call was
+  // started.
   OnConnect(Frame? frame,
             uint32 change_id,
             uint32 view_id,
             ViewConnectType view_connect_type,
-            array<FrameData>? frame_data) => ();
+            array<FrameData>? frame_data,
+            int64 navigation_start_time_ticks) => ();
 
   // Called when a new frame is added to the tree.
   OnFrameAdded(uint32 change_id, FrameData frame_data);