[Sync] Move //components/sync_driver to //components/sync/driver.

components/sync_driver/non_ui_data_type_controller.cc

Index: components/sync_driver/non_ui_data_type_controller.cc
diff --git a/components/sync_driver/non_ui_data_type_controller.cc b/components/sync_driver/non_ui_data_type_controller.cc
deleted file mode 100644
index 7fd331763f6f58c0e830a5209e27f730a1abbc5c..0000000000000000000000000000000000000000
--- a/components/sync_driver/non_ui_data_type_controller.cc
+++ /dev/null
@@ -1,424 +0,0 @@
-// 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.
-
-#include "components/sync_driver/non_ui_data_type_controller.h"
-
-#include "base/logging.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "components/sync/api/sync_error.h"
-#include "components/sync/api/sync_merge_result.h"
-#include "components/sync/api/syncable_service.h"
-#include "components/sync/base/data_type_histogram.h"
-#include "components/sync/base/model_type.h"
-#include "components/sync_driver/generic_change_processor_factory.h"
-#include "components/sync_driver/shared_change_processor_ref.h"
-#include "components/sync_driver/sync_api_component_factory.h"
-#include "components/sync_driver/sync_client.h"
-#include "components/sync_driver/sync_service.h"
-
-namespace sync_driver {
-
-SharedChangeProcessor*
-NonUIDataTypeController::CreateSharedChangeProcessor() {
-  return new SharedChangeProcessor();
-}
-
-NonUIDataTypeController::NonUIDataTypeController(
-    const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
-    const base::Closure& error_callback,
-    SyncClient* sync_client)
-    : DirectoryDataTypeController(ui_thread, error_callback),
-      sync_client_(sync_client),
-      state_(NOT_RUNNING),
-      ui_thread_(ui_thread) {}
-
-void NonUIDataTypeController::LoadModels(
-    const ModelLoadCallback& model_load_callback) {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-  model_load_callback_ = model_load_callback;
-  if (state() != NOT_RUNNING) {
-    model_load_callback.Run(type(),
-                            syncer::SyncError(FROM_HERE,
-                                              syncer::SyncError::DATATYPE_ERROR,
-                                              "Model already running",
-                                              type()));
-    return;
-  }
-
-  state_ = MODEL_STARTING;
-  // Since we can't be called multiple times before Stop() is called,
-  // |shared_change_processor_| must be NULL here.
-  DCHECK(!shared_change_processor_.get());
-  shared_change_processor_ = CreateSharedChangeProcessor();
-  DCHECK(shared_change_processor_.get());
-  if (!StartModels()) {
-    // If we are waiting for some external service to load before associating
-    // or we failed to start the models, we exit early.
-    DCHECK(state() == MODEL_STARTING || state() == NOT_RUNNING);
-    return;
-  }
-
-  OnModelLoaded();
-}
-
-void NonUIDataTypeController::OnModelLoaded() {
-  DCHECK_EQ(state_, MODEL_STARTING);
-  state_ = MODEL_LOADED;
-  model_load_callback_.Run(type(), syncer::SyncError());
-}
-
-bool NonUIDataTypeController::StartModels() {
-  DCHECK_EQ(state_, MODEL_STARTING);
-  // By default, no additional services need to be started before we can proceed
-  // with model association.
-  return true;
-}
-
-void NonUIDataTypeController::StopModels() {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-}
-
-void NonUIDataTypeController::StartAssociating(
-    const StartCallback& start_callback) {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-  DCHECK(!start_callback.is_null());
-  DCHECK_EQ(state_, MODEL_LOADED);
-  state_ = ASSOCIATING;
-
-  // Store UserShare now while on UI thread to avoid potential race
-  // condition in StartAssociationWithSharedChangeProcessor.
-  DCHECK(sync_client_->GetSyncService());
-  user_share_ = sync_client_->GetSyncService()->GetUserShare();
-
-  start_callback_ = start_callback;
-  if (!StartAssociationAsync()) {
-    syncer::SyncError error(
-        FROM_HERE,
-        syncer::SyncError::DATATYPE_ERROR,
-        "Failed to post StartAssociation",
-        type());
-    syncer::SyncMergeResult local_merge_result(type());
-    local_merge_result.set_error(error);
-    StartDoneImpl(ASSOCIATION_FAILED,
-                  NOT_RUNNING,
-                  local_merge_result,
-                  syncer::SyncMergeResult(type()));
-    // StartDoneImpl should have called ClearSharedChangeProcessor();
-    DCHECK(!shared_change_processor_.get());
-    return;
-  }
-}
-
-void NonUIDataTypeController::Stop() {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-
-  if (state() == NOT_RUNNING)
-    return;
-
-  // Disconnect the change processor. At this point, the
-  // syncer::SyncableService can no longer interact with the Syncer, even if
-  // it hasn't finished MergeDataAndStartSyncing.
-  ClearSharedChangeProcessor();
-
-  // If we haven't finished starting, we need to abort the start.
-  switch (state()) {
-    case MODEL_STARTING:
-      state_ = STOPPING;
-      AbortModelLoad();
-      return;  // The datatype was never activated, we're done.
-    case ASSOCIATING:
-      state_ = STOPPING;
-      StopModels();
-      // We continue on to deactivate the datatype and stop the local service.
-      break;
-    case MODEL_LOADED:
-    case DISABLED:
-      // If DTC is loaded or disabled, we never attempted or succeeded
-      // associating and never activated the datatype. We would have already
-      // stopped the local service in StartDoneImpl(..).
-      state_ = NOT_RUNNING;
-      StopModels();
-      return;
-    default:
-      // Datatype was fully started. Need to deactivate and stop the local
-      // service.
-      DCHECK_EQ(state(), RUNNING);
-      state_ = STOPPING;
-      StopModels();
-      break;
-  }
-
-  // Stop the local service and release our references to it and the
-  // shared change processor (posts a task to the datatype's thread).
-  StopLocalServiceAsync();
-
-  state_ = NOT_RUNNING;
-}
-
-std::string NonUIDataTypeController::name() const {
-  // For logging only.
-  return syncer::ModelTypeToString(type());
-}
-
-DataTypeController::State NonUIDataTypeController::state() const {
-  return state_;
-}
-
-void NonUIDataTypeController::OnSingleDataTypeUnrecoverableError(
-    const syncer::SyncError& error) {
-  DCHECK(!ui_thread_->BelongsToCurrentThread());
-  // TODO(tim): We double-upload some errors.  See bug 383480.
-  if (!error_callback_.is_null())
-    error_callback_.Run();
-  ui_thread_->PostTask(error.location(),
-      base::Bind(&NonUIDataTypeController::DisableImpl,
-                 this,
-                 error));
-}
-
-NonUIDataTypeController::NonUIDataTypeController()
-    : DirectoryDataTypeController(base::ThreadTaskRunnerHandle::Get(),
-                                  base::Closure()),
-      sync_client_(NULL) {}
-
-NonUIDataTypeController::~NonUIDataTypeController() {}
-
-void NonUIDataTypeController::StartDone(
-    DataTypeController::ConfigureResult start_result,
-    const syncer::SyncMergeResult& local_merge_result,
-    const syncer::SyncMergeResult& syncer_merge_result) {
-  DCHECK(!ui_thread_->BelongsToCurrentThread());
-
-  DataTypeController::State new_state;
-  if (IsSuccessfulResult(start_result)) {
-    new_state = RUNNING;
-  } else {
-    new_state = (start_result == ASSOCIATION_FAILED ? DISABLED : NOT_RUNNING);
-  }
-
-  ui_thread_->PostTask(FROM_HERE,
-      base::Bind(&NonUIDataTypeController::StartDoneImpl,
-                 this,
-                 start_result,
-                 new_state,
-                 local_merge_result,
-                 syncer_merge_result));
-}
-
-void NonUIDataTypeController::StartDoneImpl(
-    DataTypeController::ConfigureResult start_result,
-    DataTypeController::State new_state,
-    const syncer::SyncMergeResult& local_merge_result,
-    const syncer::SyncMergeResult& syncer_merge_result) {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-
-  // If we failed to start up, and we haven't been stopped yet, we need to
-  // ensure we clean up the local service and shared change processor properly.
-  if (new_state != RUNNING && state() != NOT_RUNNING && state() != STOPPING) {
-    ClearSharedChangeProcessor();
-    StopLocalServiceAsync();
-  }
-
-  // It's possible to have StartDoneImpl called first from the UI thread
-  // (due to Stop being called) and then posted from the non-UI thread. In
-  // this case, we drop the second call because we've already been stopped.
-  if (state_ == NOT_RUNNING) {
-    return;
-  }
-
-  state_ = new_state;
-  if (state_ != RUNNING) {
-    // Start failed.
-    StopModels();
-    RecordStartFailure(start_result);
-  }
-
-  start_callback_.Run(start_result, local_merge_result, syncer_merge_result);
-}
-
-void NonUIDataTypeController::RecordAssociationTime(base::TimeDelta time) {
-  DCHECK(!ui_thread_->BelongsToCurrentThread());
-#define PER_DATA_TYPE_MACRO(type_str) \
-    UMA_HISTOGRAM_TIMES("Sync." type_str "AssociationTime", time);
-  SYNC_DATA_TYPE_HISTOGRAM(type());
-#undef PER_DATA_TYPE_MACRO
-}
-
-void NonUIDataTypeController::RecordStartFailure(ConfigureResult result) {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-  UMA_HISTOGRAM_ENUMERATION("Sync.DataTypeStartFailures",
-                            ModelTypeToHistogramInt(type()),
-                            syncer::MODEL_TYPE_COUNT);
-#define PER_DATA_TYPE_MACRO(type_str)                                    \
-  UMA_HISTOGRAM_ENUMERATION("Sync." type_str "ConfigureFailure", result, \
-                            MAX_CONFIGURE_RESULT);
-  SYNC_DATA_TYPE_HISTOGRAM(type());
-#undef PER_DATA_TYPE_MACRO
-}
-
-void NonUIDataTypeController::AbortModelLoad() {
-  state_ = NOT_RUNNING;
-  StopModels();
-}
-
-void NonUIDataTypeController::DisableImpl(
-    const syncer::SyncError& error) {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-  UMA_HISTOGRAM_ENUMERATION("Sync.DataTypeRunFailures",
-                            ModelTypeToHistogramInt(type()),
-                            syncer::MODEL_TYPE_COUNT);
-  if (!model_load_callback_.is_null()) {
-    model_load_callback_.Run(type(), error);
-  }
-}
-
-bool NonUIDataTypeController::StartAssociationAsync() {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-  DCHECK_EQ(state(), ASSOCIATING);
-  return PostTaskOnBackendThread(
-      FROM_HERE,
-      base::Bind(
-          &NonUIDataTypeController::StartAssociationWithSharedChangeProcessor,
-          this,
-          shared_change_processor_));
-}
-
-ChangeProcessor* NonUIDataTypeController::GetChangeProcessor() const {
-  DCHECK_EQ(state_, RUNNING);
-  return shared_change_processor_->generic_change_processor();
-}
-
-// This method can execute after we've already stopped (and possibly even
-// destroyed) both the Syncer and the SyncableService. As a result, all actions
-// must either have no side effects outside of the DTC or must be protected
-// by |shared_change_processor|, which is guaranteed to have been Disconnected
-// if the syncer shut down.
-void NonUIDataTypeController::
-    StartAssociationWithSharedChangeProcessor(
-        const scoped_refptr<SharedChangeProcessor>& shared_change_processor) {
-  DCHECK(!ui_thread_->BelongsToCurrentThread());
-  DCHECK(shared_change_processor.get());
-  DCHECK(user_share_);
-  syncer::SyncMergeResult local_merge_result(type());
-  syncer::SyncMergeResult syncer_merge_result(type());
-  base::WeakPtrFactory<syncer::SyncMergeResult> weak_ptr_factory(
-      &syncer_merge_result);
-
-  // Connect |shared_change_processor| to the syncer and get the
-  // syncer::SyncableService associated with type().
-  // Note that it's possible the shared_change_processor has already been
-  // disconnected at this point, so all our accesses to the syncer from this
-  // point on are through it.
-  GenericChangeProcessorFactory factory;
-  local_service_ = shared_change_processor->Connect(
-      sync_client_, &factory, user_share_, this, type(),
-      weak_ptr_factory.GetWeakPtr());
-  if (!local_service_.get()) {
-    syncer::SyncError error(FROM_HERE,
-                            syncer::SyncError::DATATYPE_ERROR,
-                            "Failed to connect to syncer.",
-                            type());
-    local_merge_result.set_error(error);
-    StartDone(ASSOCIATION_FAILED,
-              local_merge_result,
-              syncer_merge_result);
-    return;
-  }
-
-  if (!shared_change_processor->CryptoReadyIfNecessary()) {
-    syncer::SyncError error(FROM_HERE,
-                            syncer::SyncError::CRYPTO_ERROR,
-                            "",
-                            type());
-    local_merge_result.set_error(error);
-    StartDone(NEEDS_CRYPTO,
-              local_merge_result,
-              syncer_merge_result);
-    return;
-  }
-
-  bool sync_has_nodes = false;
-  if (!shared_change_processor->SyncModelHasUserCreatedNodes(&sync_has_nodes)) {
-    syncer::SyncError error(FROM_HERE,
-                            syncer::SyncError::UNRECOVERABLE_ERROR,
-                            "Failed to load sync nodes",
-                            type());
-    local_merge_result.set_error(error);
-    StartDone(UNRECOVERABLE_ERROR,
-              local_merge_result,
-              syncer_merge_result);
-    return;
-  }
-
-  // Scope for |initial_sync_data| which might be expensive, so we don't want
-  // to keep it in memory longer than necessary.
-  {
-    syncer::SyncDataList initial_sync_data;
-
-    base::TimeTicks start_time = base::TimeTicks::Now();
-    syncer::SyncError error =
-        shared_change_processor->GetAllSyncDataReturnError(type(),
-                                                           &initial_sync_data);
-    if (error.IsSet()) {
-      local_merge_result.set_error(error);
-      StartDone(ASSOCIATION_FAILED, local_merge_result, syncer_merge_result);
-      return;
-    }
-
-    std::string datatype_context;
-    if (shared_change_processor->GetDataTypeContext(&datatype_context)) {
-      local_service_->UpdateDataTypeContext(
-          type(), syncer::SyncChangeProcessor::NO_REFRESH, datatype_context);
-    }
-
-    syncer_merge_result.set_num_items_before_association(
-        initial_sync_data.size());
-    // Passes a reference to |shared_change_processor|.
-    local_merge_result = local_service_->MergeDataAndStartSyncing(
-        type(), initial_sync_data,
-        std::unique_ptr<syncer::SyncChangeProcessor>(
-            new SharedChangeProcessorRef(shared_change_processor)),
-        std::unique_ptr<syncer::SyncErrorFactory>(
-            new SharedChangeProcessorRef(shared_change_processor)));
-    RecordAssociationTime(base::TimeTicks::Now() - start_time);
-    if (local_merge_result.error().IsSet()) {
-      StartDone(ASSOCIATION_FAILED, local_merge_result, syncer_merge_result);
-      return;
-    }
-  }
-
-  syncer_merge_result.set_num_items_after_association(
-      shared_change_processor->GetSyncCount());
-
-  StartDone(!sync_has_nodes ? OK_FIRST_RUN : OK,
-            local_merge_result,
-            syncer_merge_result);
-}
-
-void NonUIDataTypeController::ClearSharedChangeProcessor() {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-  // |shared_change_processor_| can already be NULL if Stop() is
-  // called after StartDoneImpl(_, DISABLED, _).
-  if (shared_change_processor_.get()) {
-    shared_change_processor_->Disconnect();
-    shared_change_processor_ = NULL;
-  }
-}
-
-void NonUIDataTypeController::StopLocalServiceAsync() {
-  DCHECK(ui_thread_->BelongsToCurrentThread());
-  PostTaskOnBackendThread(
-      FROM_HERE,
-      base::Bind(&NonUIDataTypeController::StopLocalService, this));
-}
-
-void NonUIDataTypeController::StopLocalService() {
-  DCHECK(!ui_thread_->BelongsToCurrentThread());
-  if (local_service_.get())
-    local_service_->StopSyncing(type());
-  local_service_.reset();
-}
-
-}  // namespace sync_driver