PlzNavigate: identify same-page browser-initiated navigation.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 07fc76005bd703b1b9a19dadc775e921fefab82b..433c0d4e53c8504411da8ca28fc6e08e494bc018 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -2557,6 +2557,7 @@ void RenderFrameHostImpl::CommitNavigation(
   DCHECK((response && body.get()) ||
          common_params.url.SchemeIs(url::kDataScheme) ||
          !ShouldMakeNetworkRequestForURL(common_params.url) ||
+         request_params.is_same_document_navigation ||
          IsRendererDebugURL(common_params.url));
   UpdatePermissionsForNavigation(common_params, request_params);
 
@@ -2579,8 +2580,10 @@ void RenderFrameHostImpl::CommitNavigation(
                                      request_params));
 
   // If a network request was made, update the LoFi state.
-  if (ShouldMakeNetworkRequestForURL(common_params.url))
+  if (ShouldMakeNetworkRequestForURL(common_params.url) &&
+      !request_params.is_same_document_navigation) {
     last_navigation_lofi_state_ = common_params.lofi_state;
+  }
 
   // TODO(clamy): Release the stream handle once the renderer has finished
   // reading it.