PlzNavigate: change behavior when navigating with a non-live RFH

content/browser/frame_host/render_frame_host_manager.h

Index: content/browser/frame_host/render_frame_host_manager.h
diff --git a/content/browser/frame_host/render_frame_host_manager.h b/content/browser/frame_host/render_frame_host_manager.h
index cc2e2d840dc57bf92d32d53b482e66d46a4b613a..c8db6ee623b57cd0aafb3af29ef065bafad71738 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -234,6 +234,13 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
                                    pending_and_current_web_ui_.get();
   }
 
+  // PlzNavigate
+  // Returns the speculative WebUI for the navigation (a newly created one or
+  // the current one if it should be reused). If none is set returns nullptr.
+  WebUIImpl* speculative_web_ui_for_testing() const {
+    return should_reuse_web_ui_ ? web_ui_.get() : speculative_web_ui_.get();
+  }
+
   // Called when we want to instruct the renderer to navigate to the given
   // navigation entry. It may create a new RenderFrameHost or re-use an existing
   // one. The RenderFrameHost to navigate will be returned. Returns NULL if one