UKM Sync Observer

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 181ad085a46d32321a7c8774a2449a3911163757..249871f068213729cf7d64347adea9fec72e816e 100644
--- a/components/ukm/ukm_service.h
+++ b/components/ukm/ukm_service.h
@@ -47,6 +47,10 @@ class UkmService : public base::SupportsWeakPtr<UkmService> {
   // Initializes the UKM service.
   void Initialize();
 
+  // Enables/disables recording control if data is allowed to be collected.
+  void EnableRecording();
+  void DisableRecording();
+
   // Enables/disables transmission of accumulated logs. Logs that have already
   // been created will remain persisted to disk.
   void EnableReporting();
@@ -62,6 +66,9 @@ class UkmService : public base::SupportsWeakPtr<UkmService> {
   // Deletes any unsent local data.
   void Purge();
 
+  // Resets the client id stored in prefs.
+  void ResetClientId();
+
   // Registers the specified |provider| to provide additional metrics into the
   // UKM log. Should be called during MetricsService initialization only.
   void RegisterMetricsProvider(
@@ -100,6 +107,9 @@ class UkmService : public base::SupportsWeakPtr<UkmService> {
   // A weak pointer to the PrefService used to read and write preferences.
   PrefService* pref_service_;
 
+  // Whether recording new data is currently allowed.
+  bool recording_enabled_;
+
   // The UKM client id stored in prefs.
   uint64_t client_id_;