PlzNavigate: stop navigations when opening a document for write

third_party/WebKit/public/web/WebFrameClient.h

Index: third_party/WebKit/public/web/WebFrameClient.h
diff --git a/third_party/WebKit/public/web/WebFrameClient.h b/third_party/WebKit/public/web/WebFrameClient.h
index f8b55747788d6a518330072cd51bff4854653ffa..46ddeed70546d3c7e21417258984b1e18205b4bb 100644
--- a/third_party/WebKit/public/web/WebFrameClient.h
+++ b/third_party/WebKit/public/web/WebFrameClient.h
@@ -439,6 +439,10 @@ class BLINK_EXPORT WebFrameClient {
     return WebEffectiveConnectionType::TypeUnknown;
   }
 
+  // PlzNavigate
+  // Called to abort a navigation that is being handled by the browser process.
+  virtual void abortClientNavigation() {}
+
   // Push API ---------------------------------------------------
 
   // Used to access the embedder for the Push API.