Navigation start to commit trace

content/browser/frame_host/navigator_impl.cc

Index: content/browser/frame_host/navigator_impl.cc
diff --git a/content/browser/frame_host/navigator_impl.cc b/content/browser/frame_host/navigator_impl.cc
index 41f1221c55b6bc580a68e60876c641895b3a35d5..1a29e18a5ca51c687c42f46740f415fc611f4b65 100644
--- a/content/browser/frame_host/navigator_impl.cc
+++ b/content/browser/frame_host/navigator_impl.cc
@@ -287,7 +287,7 @@ bool NavigatorImpl::NavigateToEntry(
         frame_tree_node->navigation_request()) {
       // TODO(carlosk): extend these traces to support subframes and
       // non-PlzNavigate navigations.
-      // For these traces below we're using the navigation handle as the async
+      // For the trace below we're using the navigation handle as the async
       // trace id, |navigation_start| as the timestamp and reporting the
       // FrameTreeNode id as a parameter. For navigations where no network
       // request is made (data URLs, JavaScript URLs, etc) there is no handle
@@ -297,11 +297,6 @@ bool NavigatorImpl::NavigateToEntry(
           frame_tree_node->navigation_request()->navigation_handle(),
           navigation_start.ToInternalValue(),
           "FrameTreeNode id", frame_tree_node->frame_tree_node_id());
-      TRACE_EVENT_ASYNC_BEGIN_WITH_TIMESTAMP1(
-          "navigation", "Navigation timeToCommit",
-          frame_tree_node->navigation_request()->navigation_handle(),
-          navigation_start.ToInternalValue(),
-          "FrameTreeNode id", frame_tree_node->frame_tree_node_id());
     }
 
   } else {
@@ -539,12 +534,6 @@ void NavigatorImpl::DidNavigate(
   if (!params.url_is_unreachable)
     render_frame_host->set_last_successful_url(params.url);
 
-  if (did_navigate && render_frame_host->frame_tree_node()->IsMainFrame() &&
-      IsBrowserSideNavigationEnabled()) {
-    TRACE_EVENT_ASYNC_END0("navigation", "Navigation timeToCommit",
-                           render_frame_host->navigation_handle());
-  }
-
   // Send notification about committed provisional loads. This notification is
   // different from the NAV_ENTRY_COMMITTED notification which doesn't include
   // the actual URL navigated to and isn't sent for AUTO_SUBFRAME navigations.