Revert of Ensure RenderFrameHost & NavigationHandle are not destroyed during commit

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 bce9b8bd77b938b020d7933077766ea5fa139985..7533353384367606dcd1b17fd8cc616931ba82fd 100644
--- a/content/browser/frame_host/navigator_impl.cc
+++ b/content/browser/frame_host/navigator_impl.cc
@@ -596,16 +596,9 @@ void NavigatorImpl::DidNavigate(
                                         transition_type);
     render_frame_host->navigation_handle()->DidCommitNavigation(
         params, is_navigation_within_page, render_frame_host);
-
-    // TODO(clamy): Remove this once enough data has been gathered for
-    // crbug.com/589365.
-    render_frame_host->navigation_handle()->set_is_in_commit(false);
-
     render_frame_host->SetNavigationHandle(nullptr);
   }
 
-  // TODO(clamy): The NavigationHandle should always be reset here.
-
   if (!did_navigate)
     return;  // No navigation happened.