PlzNavigate: stop navigations when opening a document for write

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 5ad6519b0a8ccde51adb6569053021d32a347a89..722a28b9feb78753752a8d177eb6fe6d5fe5ea8b 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -2725,9 +2725,15 @@ void Document::open() {
       }
     }
 
-    // PlzNavigate: We should abort ongoing navigations handled by the client.
-    if (m_frame->loader().hasProvisionalNavigation())
+    if (m_frame->loader().hasProvisionalNavigation()) {
       m_frame->loader().stopAllLoaders();
+      // PlzNavigate: navigations handled by the client should also be
+      // cancelled.
+      if (m_frame->loader().client() &&
+          m_frame->settings()->getBrowserSideNavigationEnabled()) {
+        m_frame->loader().client()->abortClientNavigation();
+      }
+    }
   }
 
   removeAllEventListenersRecursively();