Change CHECK into DCHECK.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index 690241bdb91c89732f9d49e2947edac80cb50a21..b21343358cef32faf68327503d0ca0dcaaf8c31e 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -1218,7 +1218,7 @@ void NavigationControllerImpl::RendererDidNavigateToExistingPage(
     // meanwhile and no new page was created. We are stuck at the last committed
     // entry.
     entry = GetLastCommittedEntry();
-    CHECK(!is_in_page);
+    DCHECK(!is_in_page);
     entry->GetSSL() = handle->ssl_status();
   } else if (params.nav_entry_id) {
     // This is a browser-initiated navigation (back/forward/reload).