Revert of [Sync] Move //components/sync to the syncer namespace. (patchset #5 id:40001 of https://co

components/sync/driver/sync_frontend.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SYNC_DRIVER_SYNC_FRONTEND_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_FRONTEND_H_
 
 #include <string>
 
 #include "components/sync/base/model_type.h"
 #include "components/sync/base/weak_handle.h"
 #include "components/sync/core/sync_encryption_handler.h"
 #include "components/sync/core/sync_manager.h"
 #include "components/sync/protocol/sync_protocol_error.h"
 
-namespace sync_pb {
-class EncryptedData;
-}  // namespace sync_pb
-
 namespace syncer {
-
 class DataTypeDebugInfoListener;
 class JsBackend;
 class ProtocolEvent;
 struct CommitCounters;
 struct StatusCounters;
 struct UpdateCounters;
+}  // namespace syncer
+
+namespace sync_pb {
+class EncryptedData;
+}  // namespace sync_pb
+
+namespace sync_driver {
 
 // SyncFrontend is the interface used by SyncBackendHost to communicate with
 // the entity that created it and, presumably, is interested in sync-related
 // activity.
 // NOTE: All methods will be invoked by a SyncBackendHost on the same thread
 // used to create that SyncBackendHost.
 class SyncFrontend {
  public:
   SyncFrontend();
   virtual ~SyncFrontend();
 
   // The backend has completed initialization and it is now ready to
   // accept and process changes.  If success is false, initialization
   // wasn't able to be completed and should be retried.
   //
   // |js_backend| is what about:sync interacts with; it's different
   // from the 'Backend' in 'OnBackendInitialized' (unfortunately).  It
   // is initialized only if |success| is true.
   virtual void OnBackendInitialized(
-      const WeakHandle<JsBackend>& js_backend,
-      const WeakHandle<DataTypeDebugInfoListener>& debug_info_listener,
+      const syncer::WeakHandle<syncer::JsBackend>& js_backend,
+      const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>&
+          debug_info_listener,
       const std::string& cache_guid,
       bool success) = 0;
 
   // The backend queried the server recently and received some updates.
   virtual void OnSyncCycleCompleted() = 0;
 
   // Informs the frontned of some network event.  These notifications are
   // disabled by default and must be enabled through an explicit request to the
   // SyncBackendHost.
   //
   // It's disabld by default to avoid copying data across threads when no one
   // is listening for it.
-  virtual void OnProtocolEvent(const ProtocolEvent& event) = 0;
+  virtual void OnProtocolEvent(const syncer::ProtocolEvent& event) = 0;
 
   // Called when we receive an updated commit counter for a directory type.
   //
   // Disabled by default.  Enable by calling
   // EnableDirectoryTypeDebugInfoForwarding() on the backend.
   virtual void OnDirectoryTypeCommitCounterUpdated(
-      ModelType type,
-      const CommitCounters& counters) = 0;
+      syncer::ModelType type,
+      const syncer::CommitCounters& counters) = 0;
 
   // Called when we receive an updated update counter for a directory type.
   //
   // Disabled by default.  Enable by calling
   // EnableDirectoryTypeDebugInfoForwarding() on the backend.
   virtual void OnDirectoryTypeUpdateCounterUpdated(
-      ModelType type,
-      const UpdateCounters& counters) = 0;
+      syncer::ModelType type,
+      const syncer::UpdateCounters& counters) = 0;
 
   // Called when we receive an updated status counter for a directory type.
   //
   // Disabled by default.  Enable by calling
   // EnableDirectoryTypeDebugInfoForwarding() on the backend.
   virtual void OnDirectoryTypeStatusCounterUpdated(
-      ModelType type,
-      const StatusCounters& counters) = 0;
+      syncer::ModelType type,
+      const syncer::StatusCounters& counters) = 0;
 
   // The status of the connection to the sync server has changed.
-  virtual void OnConnectionStatusChange(ConnectionStatus status) = 0;
+  virtual void OnConnectionStatusChange(syncer::ConnectionStatus status) = 0;
 
   // The syncer requires a passphrase to decrypt sensitive updates. This is
   // called when the first sensitive data type is setup by the user and anytime
   // the passphrase is changed by another synced client. |reason| denotes why
   // the passphrase was required. |pending_keys| is a copy of the
   // cryptographer's pending keys to be passed on to the frontend in order to
   // be cached.
   virtual void OnPassphraseRequired(
-      PassphraseRequiredReason reason,
+      syncer::PassphraseRequiredReason reason,
       const sync_pb::EncryptedData& pending_keys) = 0;
 
   // Called when the passphrase provided by the user is
   // accepted. After this is called, updates to sensitive nodes are
   // encrypted using the accepted passphrase.
   virtual void OnPassphraseAccepted() = 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 sent (see
   // below).
   //
   // |encrypted_types| will always be a superset of
-  // Cryptographer::SensitiveTypes().  If |encrypt_everything| is
+  // syncer::Cryptographer::SensitiveTypes().  If |encrypt_everything| is
   // true, |encrypted_types| will be the set of all known types.
   //
   // Until this function is called, observers can assume that the set
-  // of encrypted types is Cryptographer::SensitiveTypes() and that
+  // of encrypted types is syncer::Cryptographer::SensitiveTypes() and that
   // the encrypt everything flag is false.
-  virtual void OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
+  virtual void OnEncryptedTypesChanged(syncer::ModelTypeSet encrypted_types,
                                        bool encrypt_everything) = 0;
 
   // Called after we finish encrypting the current set of encrypted
   // types.
   virtual void OnEncryptionComplete() = 0;
 
   // Called to perform migration of |types|.
-  virtual void OnMigrationNeededForTypes(ModelTypeSet types) = 0;
+  virtual void OnMigrationNeededForTypes(syncer::ModelTypeSet types) = 0;
 
   // Inform the Frontend that new datatypes are available for registration.
-  virtual void OnExperimentsChanged(const Experiments& experiments) = 0;
+  virtual void OnExperimentsChanged(const syncer::Experiments& experiments) = 0;
 
   // Called when the sync cycle returns there is an user actionable error.
-  virtual void OnActionableError(const SyncProtocolError& error) = 0;
+  virtual void OnActionableError(const syncer::SyncProtocolError& error) = 0;
 
   // Called when the user of this device enables passphrase encryption.
   //
   // |nigori_state| contains the new (post custom passphrase) encryption keys
   // and can be used to restore SyncEncryptionHandler's state across sync
   // backend instances. See also SyncEncryptionHandlerImpl::RestoreNigori.
   virtual void OnLocalSetPassphraseEncryption(
-      const SyncEncryptionHandler::NigoriState& nigori_state) = 0;
+      const syncer::SyncEncryptionHandler::NigoriState& nigori_state) = 0;
 };
 
-}  // namespace syncer
+}  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_FRONTEND_H_