Change navigation_token check in DidCommitNavigationInternal to DCHECK

navigation_token is only needed for browser-initiated same-document
navigations, which is handled in DidFinishSameDocumentNavigation.

See discussion: https://groups.google.com/a/chromium.org/g/navigation-dev/c/N_QfNAB3x44/m/ABGSPq6OAgAJ

Bug: 1131832
Change-Id: I9c5ae4eb76bc361473b4ea833eee0ed6fb1d0887
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2478744Reviewed-by: Camille Lamy <clamy@chromium.org>
Commit-Queue: Rakina Zata Amni <rakina@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820228}

content/browser/renderer_host/render_frame_host_impl.cc

@@ -8454,12 +8454,9 @@ bool RenderFrameHostImpl::DidCommitNavigationInternal(
     bool is_same_document_navigation) {
   // Sanity-check the page transition for frame type.
   DCHECK_EQ(ui::PageTransitionIsMainFrame(params->transition), !GetParent());
-
-  // Check that the committing navigation token matches the navigation request.
-  if (navigation_request &&
-      navigation_request->commit_params().navigation_token !=
-          params->navigation_token) {
-    navigation_request.reset();
+  if (navigation_request) {
+    DCHECK_EQ(navigation_request->commit_params().navigation_token,
+              params->navigation_token);
   }
 
   if (!navigation_request) {