Reland #2 Remove the is_loading_ field from WebContentsImpl

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 bd13fd745dc63b81b2f6cf9b42a684aa6a3bbfc3..6c5b787deea0eaba2d598c0937a477cc10214144 100644
--- a/content/browser/frame_host/navigator_impl.cc
+++ b/content/browser/frame_host/navigator_impl.cc
@@ -344,14 +344,24 @@ bool NavigatorImpl::NavigateToEntry(
   // Double check that here.
   CheckWebUIRendererDoesNotDisplayNormalURL(dest_render_frame_host, dest_url);
 
+  // In the case of a transfer navigation, set the destination RenderFrameHost
+  // as loading.  This ensures that the RenderFrameHost gets in a loading state
+  // without emitting a spurious DidStartLoading notification at the
+  // FrameTreeNode level (since the FrameTreeNode was already loading). Note
+  // that this works both for a transfer to a different RenderFrameHost and in
+  // the rare case where the navigation is transferred back to the same
+  // RenderFrameHost.
+  bool is_transfer = entry.transferred_global_request_id().child_id != -1;
+  if (is_transfer)
+    dest_render_frame_host->set_is_loading(true);
+
   // Navigate in the desired RenderFrameHost.
   // We can skip this step in the rare case that this is a transfer navigation
   // which began in the chosen RenderFrameHost, since the request has already
   // been issued.  In that case, simply resume the response.
-  bool is_transfer_to_same =
-      entry.transferred_global_request_id().child_id != -1 &&
-      entry.transferred_global_request_id().child_id ==
-          dest_render_frame_host->GetProcess()->GetID();
+  bool is_transfer_to_same = is_transfer &&
+                             entry.transferred_global_request_id().child_id ==
+                                 dest_render_frame_host->GetProcess()->GetID();
   if (!is_transfer_to_same) {
     navigation_data_.reset(new NavigationMetricsData(navigation_start, dest_url,
                                                      entry.restore_type()));