sync: Finish non-blocking type encryption support

sync/sessions/model_type_registry.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 SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_
 #define SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "sync/base/sync_export.h"
-#include "sync/engine/directory_cryptographer_provider.h"
 #include "sync/engine/nudge_handler.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/engine/model_safe_worker.h"
 #include "sync/internal_api/public/non_blocking_sync_common.h"
 #include "sync/internal_api/public/sessions/type_debug_info_observer.h"
 #include "sync/internal_api/public/sync_context.h"
+#include "sync/internal_api/public/sync_encryption_handler.h"
 
 namespace syncer {
 
 namespace syncable {
 class Directory;
 }  // namespace syncable
 
 class CommitContributor;
 class DirectoryCommitContributor;
 class DirectoryUpdateHandler;
 class DirectoryTypeDebugInfoEmitter;
 class ModelTypeSyncWorkerImpl;
 class ModelTypeSyncProxyImpl;
 class UpdateHandler;
 
 typedef std::map<ModelType, UpdateHandler*> UpdateHandlerMap;
 typedef std::map<ModelType, CommitContributor*> CommitContributorMap;
 typedef std::map<ModelType, DirectoryTypeDebugInfoEmitter*>
     DirectoryTypeDebugInfoEmitterMap;
 
 // Keeps track of the sets of active update handlers and commit contributors.
-class SYNC_EXPORT_PRIVATE ModelTypeRegistry : public SyncContext {
+class SYNC_EXPORT_PRIVATE ModelTypeRegistry
+    : public SyncContext,
+      public SyncEncryptionHandler::Observer {
  public:
   // Constructs a ModelTypeRegistry that supports directory types.
   ModelTypeRegistry(const std::vector<scoped_refptr<ModelSafeWorker> >& workers,
                     syncable::Directory* directory,
                     NudgeHandler* nudge_handler);
   virtual ~ModelTypeRegistry();
 
   // Sets the set of enabled types.
   void SetEnabledDirectoryTypes(const ModelSafeRoutingInfo& routing_info);
 
   // Enables an off-thread type for syncing.  Connects the given proxy
   // and its task_runner to the newly created worker.
   //
   // Expects that the proxy's ModelType is not currently enabled.
   virtual void ConnectSyncTypeToWorker(
       syncer::ModelType type,
       const DataTypeState& data_type_state,
       const syncer::UpdateResponseDataList& saved_pending_updates,
       const scoped_refptr<base::SequencedTaskRunner>& type_task_runner,
       const base::WeakPtr<ModelTypeSyncProxyImpl>& proxy) OVERRIDE;
 
   // Disables the syncing of an off-thread type.
   //
   // Expects that the type is currently enabled.
   // Deletes the worker associated with the type.
   virtual void DisconnectSyncWorker(syncer::ModelType type) OVERRIDE;
 
+  // Implementation of NonBlockingEncryptionCacheObserver
+  virtual void OnPassphraseRequired(
+      PassphraseRequiredReason reason,
+      const sync_pb::EncryptedData& pending_keys) OVERRIDE;
+  virtual void OnPassphraseAccepted() OVERRIDE;
+  virtual void OnBootstrapTokenUpdated(const std::string& bootstrap_token,
+                                       BootstrapTokenType type) OVERRIDE;
+  virtual void OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
+                                       bool encrypt_everything) OVERRIDE;
+  virtual void OnEncryptionComplete() OVERRIDE;
+  virtual void OnCryptographerStateChanged(
+      Cryptographer* cryptographer) OVERRIDE;
+  virtual void OnPassphraseTypeChanged(PassphraseType type,
+                                       base::Time passphrase_time) OVERRIDE;
+
   // Gets the set of enabled types.
   ModelTypeSet GetEnabledTypes() const;
 
   // Simple getters.
   UpdateHandlerMap* update_handler_map();
   CommitContributorMap* commit_contributor_map();
   DirectoryTypeDebugInfoEmitterMap* directory_type_debug_info_emitter_map();
 
   void RegisterDirectoryTypeDebugInfoObserver(
       syncer::TypeDebugInfoObserver* observer);
   void UnregisterDirectoryTypeDebugInfoObserver(
       syncer::TypeDebugInfoObserver* observer);
   bool HasDirectoryTypeDebugInfoObserver(
       syncer::TypeDebugInfoObserver* observer);
   void RequestEmitDebugInfo();
 
   base::WeakPtr<SyncContext> AsWeakPtr();
 
  private:
+  void OnEncryptionStateChanged();
+
   ModelTypeSet GetEnabledNonBlockingTypes() const;
   ModelTypeSet GetEnabledDirectoryTypes() const;
 
   // Sets of handlers and contributors.
   ScopedVector<DirectoryCommitContributor> directory_commit_contributors_;
   ScopedVector<DirectoryUpdateHandler> directory_update_handlers_;
   ScopedVector<DirectoryTypeDebugInfoEmitter>
       directory_type_debug_info_emitters_;
 
   ScopedVector<ModelTypeSyncWorkerImpl> model_type_sync_workers_;
 
   // Maps of UpdateHandlers and CommitContributors.
   // They do not own any of the objects they point to.
   UpdateHandlerMap update_handler_map_;
   CommitContributorMap commit_contributor_map_;
 
   // Map of DebugInfoEmitters for directory types.
   // Non-blocking types handle debug info differently.
   // Does not own its contents.
   DirectoryTypeDebugInfoEmitterMap directory_type_debug_info_emitter_map_;
 
   // The known ModelSafeWorkers.
   std::map<ModelSafeGroup, scoped_refptr<ModelSafeWorker> > workers_map_;
 
   // The directory.  Not owned.
   syncable::Directory* directory_;
 
-  // Provides access to the Directory's cryptographer.
-  DirectoryCryptographerProvider cryptographer_provider_;
+  // A copy of the directory's most recent cryptographer.
+  scoped_ptr<Cryptographer> cryptographer_;
+
+  // The set of encrypted types.
+  ModelTypeSet encrypted_types_;
+
+  // A helper that manages cryptography state and preferences.
+  SyncEncryptionHandler* encryption_handler_;
 
   // The NudgeHandler.  Not owned.
   NudgeHandler* nudge_handler_;
 
   // The set of enabled directory types.
   ModelTypeSet enabled_directory_types_;
 
   // The set of observers of per-type debug info.
   //
   // Each of the DirectoryTypeDebugInfoEmitters needs such a list.  There's
   // a lot of them, and their lifetimes are unpredictable, so it makes the
   // book-keeping easier if we just store the list here.  That way it's
   // guaranteed to live as long as this sync backend.
   ObserverList<TypeDebugInfoObserver> type_debug_info_observers_;
 
   base::WeakPtrFactory<ModelTypeRegistry> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ModelTypeRegistry);
 };
 
 }  // namespace syncer
 
 #endif // SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_