make NavigationGesture part of public content API and use it outside content

chrome/browser/page_load_metrics/page_load_tracker.cc

Index: chrome/browser/page_load_metrics/page_load_tracker.cc
diff --git a/chrome/browser/page_load_metrics/page_load_tracker.cc b/chrome/browser/page_load_metrics/page_load_tracker.cc
index fa68a29219cbe453f9effabe0f40fb398bd64fad..2250361491b8722902705d6684fd596f4d8e2e95 100644
--- a/chrome/browser/page_load_metrics/page_load_tracker.cc
+++ b/chrome/browser/page_load_metrics/page_load_tracker.cc
@@ -88,14 +88,15 @@ void LogAbortChainSameURLHistogram(int aborted_chain_size_same_url) {
 
 bool IsNavigationUserInitiated(content::NavigationHandle* handle) {
   // TODO(crbug.com/617904): Browser initiated navigations should have
-  // HasUserGesture() set to true. In the meantime, we consider all
-  // browser-initiated navigations to be user initiated.
+  // GetNavigationGesture() return NavigationGestureUser. In the meantime, we
+  // consider all browser-initiated navigations to be user initiated.
   //
   // TODO(crbug.com/637345): Some browser-initiated navigations incorrectly
   // report that they are renderer-initiated. We will currently report that
   // these navigations are not user initiated, when in fact they are user
   // initiated.
-  return handle->HasUserGesture() || !handle->IsRendererInitiated();
+  return handle->GetNavigationGesture() == content::NavigationGestureUser ||
+         !handle->IsRendererInitiated();
 }
 
 namespace {