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 d154c7ce1f9b43fba5a2bd05a3baea232e9fbd0c..b7ea3a1baa2c3a3530f77087599366cc42786d64 100644
--- a/components/ukm/ukm_service.h
+++ b/components/ukm/ukm_service.h
@@ -45,6 +45,10 @@ class UkmService : public base::SupportsWeakPtr<UkmService> {
   // Initializes the UKM service.
   void Initialize();
 
+  // Enable/disable recording control if data is allowed to be collected.
+  void EnableRecording();
+  void DisableRecording();
+
   // Enable/disable transmission of accumulated logs.  Logs that have already
   // been created will remain persisted to disk.
   void EnableReporting();
@@ -60,6 +64,9 @@ class UkmService : public base::SupportsWeakPtr<UkmService> {
   // Delete any unsent local data.
   void Purge();
 
+  // Resets the client id stored in prefs.
+  void ResetClientId();
+
   // Registers the names of all of the preferences used by UkmService in
   // the provided PrefRegistry.
   static void RegisterPrefs(PrefRegistrySimple* registry);
@@ -93,6 +100,9 @@ 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_;