Remove IsSynchronous API from NavigationHandle.

chrome/browser/extensions/api/web_navigation/web_navigation_api.cc

Index: chrome/browser/extensions/api/web_navigation/web_navigation_api.cc
diff --git a/chrome/browser/extensions/api/web_navigation/web_navigation_api.cc b/chrome/browser/extensions/api/web_navigation/web_navigation_api.cc
index c15439bae6a5f3ba61cb5e4f6c807d1dee0754b3..eb1f273e9f0fde8143b38baa35d9a02283a6cba3 100644
--- a/chrome/browser/extensions/api/web_navigation/web_navigation_api.cc
+++ b/chrome/browser/extensions/api/web_navigation/web_navigation_api.cc
@@ -269,7 +269,7 @@ void WebNavigationTabObserver::RenderFrameHostChanged(
 
 void WebNavigationTabObserver::DidStartNavigation(
     content::NavigationHandle* navigation_handle) {
-  if (navigation_handle->IsSynchronousNavigation() ||
+  if (navigation_handle->IsSamePage() ||
       !FrameNavigationState::IsValidUrl(navigation_handle->GetURL())) {
     return;
   }