[Sync] SyncEngine 1.5: Fix all backend references in PSS.

components/sync/engine/sync_engine_host.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_ENGINE_SYNC_ENGINE_HOST_H_
 #define COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_HOST_H_
 
 #include <string>
 
 #include "components/sync/base/model_type.h"
@@ skipping 16 matching lines @@
 struct UpdateCounters;
 
 // SyncEngineHost is the interface used by SyncEngine to communicate with the
 // entity that created it. It's essentially an observer interface except the
 // SyncEngine always has exactly one.
 class SyncEngineHost {
  public:
   SyncEngineHost();
   virtual ~SyncEngineHost();
 
-  // 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.
+  // The engine 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(
+  // |js_backend| is what about:sync interacts with. It is initialized only if
+  // |success| is true.
+  virtual void OnEngineInitialized(
       const WeakHandle<JsBackend>& js_backend,
       const WeakHandle<DataTypeDebugInfoListener>& debug_info_listener,
       const std::string& cache_guid,
       bool success) = 0;
 
-  // The backend queried the server recently and received some updates.
+  // The engine queried the server recently and received some updates.
   virtual void OnSyncCycleCompleted() = 0;
 
   // Informs the host of some network event. These notifications are disabled by
   // default and must be enabled through an explicit request to the SyncEngine.
   //
   // It's disabled by default to avoid copying data across threads when no one
   // is listening for it.
   virtual void OnProtocolEvent(const 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.
+  // EnableDirectoryTypeDebugInfoForwarding() on the engine.
   virtual void OnDirectoryTypeCommitCounterUpdated(
       ModelType type,
       const 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.
+  // EnableDirectoryTypeDebugInfoForwarding() on the engine.
   virtual void OnDirectoryTypeUpdateCounterUpdated(
       ModelType type,
       const UpdateCounters& counters) = 0;
 
   // Called when we receive an updated status counter for a datatype.
   //
   // Disabled by default.  Enable by calling
-  // EnableDirectoryTypeDebugInfoForwarding() on the backend.
+  // EnableDirectoryTypeDebugInfoForwarding() on the engine.
   virtual void OnDatatypeStatusCounterUpdated(
       ModelType type,
       const StatusCounters& counters) = 0;
 
   // The status of the connection to the sync server has changed.
   virtual void OnConnectionStatusChange(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
@@ skipping 34 matching lines @@
   // Called when new datatypes are available for registration.
   virtual void OnExperimentsChanged(const Experiments& experiments) = 0;
 
   // Called when the sync cycle returns there is an user actionable error.
   virtual void OnActionableError(const 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.
+  // engine instances. See also SyncEncryptionHandlerImpl::RestoreNigori.
   virtual void OnLocalSetPassphraseEncryption(
       const SyncEncryptionHandler::NigoriState& nigori_state) = 0;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_SYNC_ENGINE_HOST_H_