[SyncFS] Expand simple functions to their caller in drive_backend/

These functions used to be called asynchronously, and recently switched to be synchronous.
Then it's more readable to expand them to their caller.

BUG=412367

Review URL: https://codereview.chromium.org/560703002

Cr-Commit-Position: refs/heads/master@{#294140}

chrome/browser/sync_file_system/drive_backend/folder_creator.cc

@@ -114,14 +114,6 @@ void FolderCreator::DidListFolders(
   std::string file_id = oldest->file_id();
 
   status = metadata_database_->UpdateByFileResourceList(candidates.Pass());
-
-  // TODO(tzik): Expand this function.
-  DidUpdateDatabase(file_id, callback, status);
-}
-
-void FolderCreator::DidUpdateDatabase(const std::string& file_id,
-                                      const FileIDCallback& callback,
-                                      SyncStatusCode status) {
   if (status != SYNC_STATUS_OK) {
     callback.Run(std::string(), status);
     return;

chrome/browser/sync_file_system/drive_backend/folder_creator.h

@@ -50,9 +50,6 @@ class FolderCreator {
                       ScopedVector<google_apis::FileResource> candidates,
                       google_apis::GDataErrorCode error,
                       scoped_ptr<google_apis::FileList> file_list);
-  void DidUpdateDatabase(const std::string& file_id,
-                         const FileIDCallback& callback,
-                         SyncStatusCode status);
 
   drive::DriveServiceInterface* drive_service_;
   MetadataDatabase* metadata_database_;

chrome/browser/sync_file_system/drive_backend/list_changes_task.cc

@@ -123,13 +123,6 @@ void ListChangesTask::CheckInChangeList(int64 largest_change_id,
   SyncStatusCode status =
       metadata_database()->UpdateByChangeList(
           largest_change_id, change_list_.Pass());
-
-  // TODO(tzik): Expand this function.
-  DidCheckInChangeList(token.Pass(), status);
-}
-
-void ListChangesTask::DidCheckInChangeList(scoped_ptr<SyncTaskToken> token,
-                                           SyncStatusCode status) {
   if (status != SYNC_STATUS_OK) {
     SyncTaskManager::NotifyTaskDone(token.Pass(), status);
     return;

chrome/browser/sync_file_system/drive_backend/list_changes_task.h

@@ -40,8 +40,6 @@ class ListChangesTask : public SyncTask {
                       scoped_ptr<google_apis::ChangeList> change_list);
   void CheckInChangeList(int64 largest_change_id,
                          scoped_ptr<SyncTaskToken> token);
-  void DidCheckInChangeList(scoped_ptr<SyncTaskToken> token,
-                            SyncStatusCode status);
 
   bool IsContextReady();
   MetadataDatabase* metadata_database();

chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc

@@ -548,14 +548,6 @@ void LocalToRemoteSyncer::DidUploadExistingFile(
 
   DCHECK(entry);
   status = metadata_database()->UpdateByFileResource(*entry);
-
-  // TODO(tzik): Expand this function.
-  DidUpdateDatabaseForUploadExistingFile(token.Pass(), status);
-}
-
-void LocalToRemoteSyncer::DidUpdateDatabaseForUploadExistingFile(
-    scoped_ptr<SyncTaskToken> token,
-    SyncStatusCode status) {
   if (status != SYNC_STATUS_OK) {
     SyncCompleted(token.Pass(), status);
     return;

chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.h

@@ -80,9 +80,6 @@ class LocalToRemoteSyncer : public SyncTask {
                              google_apis::GDataErrorCode error,
                              const GURL&,
                              scoped_ptr<google_apis::FileResource>);
-  void DidUpdateDatabaseForUploadExistingFile(
-      scoped_ptr<SyncTaskToken> token,
-      SyncStatusCode status);
   void UpdateRemoteMetadata(const std::string& file_id,
                             scoped_ptr<SyncTaskToken> token);
   void DidGetRemoteMetadata(const std::string& file_id,

chrome/browser/sync_file_system/drive_backend/remote_to_local_syncer.cc

@@ -328,13 +328,6 @@ void RemoteToLocalSyncer::DidGetRemoteMetadata(
   }
 
   status = metadata_database()->UpdateByFileResource(*entry);
-  // TODO(tzik): Expand this function.
-  DidUpdateDatabaseForRemoteMetadata(token.Pass(), status);
-}
-
-void RemoteToLocalSyncer::DidUpdateDatabaseForRemoteMetadata(
-    scoped_ptr<SyncTaskToken> token,
-    SyncStatusCode status) {
   if (status != SYNC_STATUS_OK) {
     SyncCompleted(token.Pass(), status);
     return;
@@ -629,7 +622,6 @@ void RemoteToLocalSyncer::SyncCompleted(scoped_ptr<SyncTaskToken> token,
 
   status = metadata_database()->UpdateTracker(
       dirty_tracker_->tracker_id(), updated_details);
-  // TODO(tzik): Expand this function.
   FinalizeSync(token.Pass(), status);
 }
 

chrome/browser/sync_file_system/drive_backend/remote_to_local_syncer.h

@@ -110,8 +110,6 @@ class RemoteToLocalSyncer : public SyncTask {
   void DidGetRemoteMetadata(scoped_ptr<SyncTaskToken> token,
                             google_apis::GDataErrorCode error,
                             scoped_ptr<google_apis::FileResource> entry);
-  void DidUpdateDatabaseForRemoteMetadata(scoped_ptr<SyncTaskToken> token,
-                                          SyncStatusCode status);
 
   // This implements the body of the HandleNewFile and HandleContentUpdate.
   // If the file doesn't have corresponding local file:

chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.cc

@@ -88,18 +88,7 @@ void SyncEngineInitializer::RunPreflight(scoped_ptr<SyncTaskToken> token) {
   SyncStatusCode status = SYNC_STATUS_FAILED;
   scoped_ptr<MetadataDatabase> metadata_database =
       MetadataDatabase::Create(database_path_, env_override_, &status);
-  // TODO(tzik): Expand this function.
-  DidCreateMetadataDatabase(token.Pass(), status, metadata_database.Pass());
-}
 
-scoped_ptr<MetadataDatabase> SyncEngineInitializer::PassMetadataDatabase() {
-  return metadata_database_.Pass();
-}
-
-void SyncEngineInitializer::DidCreateMetadataDatabase(
-    scoped_ptr<SyncTaskToken> token,
-    SyncStatusCode status,
-    scoped_ptr<MetadataDatabase> instance) {
   if (status != SYNC_STATUS_OK) {
     util::Log(logging::LOG_VERBOSE, FROM_HERE,
               "[Initialize] Failed to initialize MetadataDatabase.");
@@ -107,8 +96,8 @@ void SyncEngineInitializer::DidCreateMetadataDatabase(
     return;
   }
 
-  DCHECK(instance);
-  metadata_database_ = instance.Pass();
+  DCHECK(metadata_database);
+  metadata_database_ = metadata_database.Pass();
   if (metadata_database_->HasSyncRoot()) {
     util::Log(logging::LOG_VERBOSE, FROM_HERE,
               "[Initialize] Found local cache of sync-root.");
@@ -119,6 +108,10 @@ void SyncEngineInitializer::DidCreateMetadataDatabase(
   GetAboutResource(token.Pass());
 }
 
+scoped_ptr<MetadataDatabase> SyncEngineInitializer::PassMetadataDatabase() {
+  return metadata_database_.Pass();
+}
+
 void SyncEngineInitializer::GetAboutResource(
     scoped_ptr<SyncTaskToken> token) {
   set_used_network(true);
@@ -348,13 +341,6 @@ void SyncEngineInitializer::PopulateDatabase(
   DCHECK(sync_root_folder_);
   SyncStatusCode status = metadata_database_->PopulateInitialData(
       largest_change_id_, *sync_root_folder_, app_root_folders_);
-  // TODO(tzik): Expand this function.
-  DidPopulateDatabase(token.Pass(), status);
-}
-
-void SyncEngineInitializer::DidPopulateDatabase(
-    scoped_ptr<SyncTaskToken> token,
-    SyncStatusCode status) {
   if (status != SYNC_STATUS_OK) {
     util::Log(logging::LOG_VERBOSE, FROM_HERE,
               "[Initialize] Failed to populate initial data"

chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.h

@@ -77,10 +77,6 @@ class SyncEngineInitializer : public SyncTask {
  private:
   typedef base::Callback<void(const SyncStatusCallback& callback)> Task;
 
-  void DidCreateMetadataDatabase(scoped_ptr<SyncTaskToken> token,
-                                 SyncStatusCode status,
-                                 scoped_ptr<MetadataDatabase> instance);
-
   void GetAboutResource(scoped_ptr<SyncTaskToken> token);
   void DidGetAboutResource(
       scoped_ptr<SyncTaskToken> token,
@@ -103,8 +99,6 @@ class SyncEngineInitializer : public SyncTask {
       google_apis::GDataErrorCode error,
       scoped_ptr<google_apis::FileList> file_list);
   void PopulateDatabase(scoped_ptr<SyncTaskToken> token);
-  void DidPopulateDatabase(scoped_ptr<SyncTaskToken> token,
-                           SyncStatusCode status);
 
   SyncEngineContext* sync_context_;  // Not owned.
   leveldb::Env* env_override_;