UKM debug page

components/ukm/ukm_service.h

Index: components/ukm/ukm_service.h
diff --git a/components/ukm/ukm_service.h b/components/ukm/ukm_service.h
index 9b493a2a2132e9817388bf63ee6d8de03401465f..584be39f911088fd8d3e0cb3927daf1a304bac09 100644
--- a/components/ukm/ukm_service.h
+++ b/components/ukm/ukm_service.h
@@ -47,6 +47,10 @@ class UkmEntry;
 class UkmEntryBuilder;
 class UkmSource;
 
+namespace debug {
+class DebugPage;
+}
+
 // This feature controls whether UkmService should be created.
 extern const base::Feature kUkmFeature;
 
@@ -117,6 +121,7 @@ class UkmService {
   }
 
  private:
+  friend ::ukm::debug::DebugPage;
   friend autofill::AutofillMetrics;
   friend payments::JourneyLogger;
   friend PluginInfoMessageFilter;