PlzNavigate: fix regression on the FYI bot.

third_party/WebKit/Source/core/loader/FrameLoader.h

Index: third_party/WebKit/Source/core/loader/FrameLoader.h
diff --git a/third_party/WebKit/Source/core/loader/FrameLoader.h b/third_party/WebKit/Source/core/loader/FrameLoader.h
index be92d674fa823fa97707c9c8c20f598a79e62151..2ea61e15af0af614bde2d4f412ad9a1694996205 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoader.h
+++ b/third_party/WebKit/Source/core/loader/FrameLoader.h
@@ -220,6 +220,10 @@ class CORE_EXPORT FrameLoader final {
     return provisionalDocumentLoader() || m_isNavigationHandledByClient;
   }
 
+  void clearNavigationHandledByClient() {
+    m_isNavigationHandledByClient = false;
+  }
+
   DECLARE_TRACE();
 
   static void setReferrerForFrameRequest(FrameLoadRequest&);