Initial UKMPageLoadMetricsObserver

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 79422c540e53503bd5f37961d2ec20da282010b3..d1188c1c2a8b6441c33cdfcfb9cd094e1cc4b0e2 100644
--- a/components/ukm/ukm_service.h
+++ b/components/ukm/ukm_service.h
@@ -23,6 +23,8 @@ class MetricsServiceClient;
 
 namespace ukm {
 
+class UkmSource;
+
 // Manages the generation and uploading of UKM reports.
 // These reports contained fine grained performance metrics including URLs for
 // top-level navigations.
@@ -42,6 +44,8 @@ class UkmService : public base::SupportsWeakPtr<UkmService> {
   void EnableReporting();
   void DisableReporting();
 
+  void RecordSource(std::unique_ptr<UkmSource> source);
+
   // Registers the names of all of the preferences used by UkmService in
   // the provided PrefRegistry.
   static void RegisterPrefs(PrefRegistrySimple* registry);
@@ -91,6 +95,8 @@ class UkmService : public base::SupportsWeakPtr<UkmService> {
   bool initialize_started_;
   bool log_upload_in_progress_;
 
+  std::vector<std::unique_ptr<UkmSource>> sources_;
+
   // Weak pointers factory used to post task on different threads. All weak
   // pointers managed by this factory have the same lifetime as UkmService.
   base::WeakPtrFactory<UkmService> self_ptr_factory_;