Add TimeToScrollUpdateSwapBegin2 to UKM

components/ukm/public/ukm_recorder.h

 // Copyright 2017 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.
 
 #ifndef COMPONENTS_UKM_PUBLIC_UKM_RECORDER_H_
 #define COMPONENTS_UKM_PUBLIC_UKM_RECORDER_H_
 
 #include <stddef.h>
 
 #include "base/callback.h"
 #include "base/feature_list.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "components/ukm/public/interfaces/ukm_interface.mojom.h"
 #include "components/ukm/public/ukm_entry_builder.h"
 #include "components/ukm/public/ukm_export.h"
 #include "url/gurl.h"
 
 class ContextualSearchRankerLoggerImpl;
 class PluginInfoMessageFilter;
 class UkmPageLoadMetricsObserver;
 
 namespace autofill {
 class AutofillMetrics;
 }
 
 namespace content {
 class MediaInternals;
 class RenderFrameImpl;
+class RenderWidgetHostLatencyTracker;
 }
 
 namespace translate {
 class TranslateRankerImpl;
 }
 
 namespace payments {
 class JourneyLogger;
 }
 
@@ skipping 31 matching lines @@
   friend autofill::AutofillMetrics;
   friend payments::JourneyLogger;
   friend ContextualSearchRankerLoggerImpl;
   friend PluginInfoMessageFilter;
   friend UkmPageLoadMetricsObserver;
   friend translate::TranslateRankerImpl;
   friend TestRecordingHelper;
   friend UkmInterface;
   friend content::MediaInternals;
   friend content::RenderFrameImpl;
+  friend content::RenderWidgetHostLatencyTracker;
   FRIEND_TEST_ALL_PREFIXES(UkmServiceTest, AddEntryWithEmptyMetrics);
   FRIEND_TEST_ALL_PREFIXES(UkmServiceTest, EntryBuilderAndSerialization);
   FRIEND_TEST_ALL_PREFIXES(UkmServiceTest,
                            LogsUploadedOnlyWhenHavingSourcesOrEntries);
   FRIEND_TEST_ALL_PREFIXES(UkmServiceTest, MetricsProviderTest);
   FRIEND_TEST_ALL_PREFIXES(UkmServiceTest, PersistAndPurge);
   FRIEND_TEST_ALL_PREFIXES(UkmServiceTest, WhitelistEntryTest);
 
   // Get a new UkmEntryBuilder object for the specified source ID and event,
   // which can get metrics added to.
   //
   // This API being private is intentional. Any client using UKM needs to
   // declare itself to be a friend of UkmService and go through code review
   // process.
   std::unique_ptr<UkmEntryBuilder> GetEntryBuilder(SourceId source_id,
                                                    const char* event_name);
 
  private:
   // Add an entry to the UkmEntry list.
   virtual void AddEntry(mojom::UkmEntryPtr entry) = 0;
 
   DISALLOW_COPY_AND_ASSIGN(UkmRecorder);
 };
 
 }  // namespace ukm
 
 #endif  // COMPONENTS_UKM_PUBLIC_UKM_RECORDER_H_