Revert of Ensure RenderFrameHost & NavigationHandle are not destroyed during commit

content/browser/frame_host/navigation_handle_impl.cc

Index: content/browser/frame_host/navigation_handle_impl.cc
diff --git a/content/browser/frame_host/navigation_handle_impl.cc b/content/browser/frame_host/navigation_handle_impl.cc
index 37a325bdbd7c4a4c52084ef5b1b33cba644a578b..dde5fa77087d7a6db28a97b0a27ce56ffa045e43 100644
--- a/content/browser/frame_host/navigation_handle_impl.cc
+++ b/content/browser/frame_host/navigation_handle_impl.cc
@@ -65,8 +65,7 @@ NavigationHandleImpl::NavigationHandleImpl(
       frame_tree_node_(frame_tree_node),
       next_index_(0),
       navigation_start_(navigation_start),
-      pending_nav_entry_id_(pending_nav_entry_id),
-      is_in_commit_(false) {
+      pending_nav_entry_id_(pending_nav_entry_id) {
   DCHECK(!navigation_start.is_null());
   GetDelegate()->DidStartNavigation(this);
 }
@@ -74,8 +73,6 @@ NavigationHandleImpl::NavigationHandleImpl(
 NavigationHandleImpl::~NavigationHandleImpl() {
   GetDelegate()->DidFinishNavigation(this);
 
-  CHECK(!is_in_commit_);
-
   // Cancel the navigation on the IO thread if the NavigationHandle is being
   // destroyed in the middle of the NavigationThrottles checks.
   if (!IsBrowserSideNavigationEnabled() && !complete_callback_.is_null())