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

chrome/browser/page_load_metrics/page_load_tracker.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/page_load_metrics/page_load_tracker.h"
 
 #include <algorithm>
 #include <ostream>
 #include <string>
 #include <utility>
@@ skipping 70 matching lines @@
 
 void LogAbortChainSameURLHistogram(int aborted_chain_size_same_url) {
   if (aborted_chain_size_same_url > 0) {
     UMA_HISTOGRAM_COUNTS(internal::kAbortChainSizeSameURL,
                          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 {
 
 // Helper to allow use of Optional<> values in LOG() messages.
 std::ostream& operator<<(std::ostream& os,
                          const base::Optional<base::TimeDelta>& opt) {
   if (opt)
     os << opt.value();
   else
@@ skipping 569 matching lines @@
   // explicitly filter these types of aborts out when deciding if the abort was
   // user initiated.
   abort_user_initiated_ = user_initiated && abort_type != ABORT_CLIENT_REDIRECT;
 
   if (is_certainly_browser_timestamp) {
     ClampBrowserTimestampIfInterProcessTimeTickSkew(&abort_time_);
   }
 }
 
 }  // namespace page_load_metrics