sync: Remove ClearUserData command.

sync/internal_api/public/sync_manager.h

Index: sync/internal_api/public/sync_manager.h
diff --git a/sync/internal_api/public/sync_manager.h b/sync/internal_api/public/sync_manager.h
index 351cf5c0a4026f8a6f29448d7a9aecae63c07f78..fc66204106faed3b1eea8b57ec0bce5e2fe6d2fa 100644
--- a/sync/internal_api/public/sync_manager.h
+++ b/sync/internal_api/public/sync_manager.h
@@ -309,11 +309,6 @@ class SyncManager {
     // global stop syncing operation has wiped the store.
     virtual void OnStopSyncingPermanently() = 0;
 
-    // After a request to clear server data, these callbacks are invoked to
-    // indicate success or failure.
-    virtual void OnClearServerDataSucceeded() = 0;
-    virtual void OnClearServerDataFailed() = 0;
-
     // Called when the set of encrypted types or the encrypt
     // everything flag has been changed.  Note that encryption isn't
     // complete until the OnEncryptionComplete() notification has been
@@ -446,9 +441,6 @@ class SyncManager {
   void RequestCleanupDisabledTypes(
       const browser_sync::ModelSafeRoutingInfo& routing_info);
 
-  // Request a clearing of all data on the server
-  void RequestClearServerData();
-
   // Adds a listener to be notified of sync events.
   // NOTE: It is OK (in fact, it's probably a good idea) to call this before
   // having received OnInitializationCompleted.