[SyncFS] Implement Database initialization part of SyncEngineInitializer

chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.cc b/chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.cc
index b1ff4b0b58750360b7dc567fdf4280337dfd9af1..9cefcf19279b4ae2e40efed3046882c1a12f90c8 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.cc
@@ -4,14 +4,22 @@
 
 #include "chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.h"
 
+#include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
+#include "chrome/browser/sync_file_system/drive_backend/metadata_database.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
-SyncEngineInitializer::SyncEngineInitializer() {
-  NOTIMPLEMENTED();
+SyncEngineInitializer::SyncEngineInitializer(
+    base::SequencedTaskRunner* task_runner,
+    drive::DriveAPIService* drive_api,
+    const base::FilePath& database_path)
+    : task_runner_(task_runner),
+      drive_api_(drive_api),
+      database_path_(database_path),
+      weak_ptr_factory_(this) {
 }
 
 SyncEngineInitializer::~SyncEngineInitializer() {
@@ -19,6 +27,26 @@ SyncEngineInitializer::~SyncEngineInitializer() {
 }
 
 void SyncEngineInitializer::Run(const SyncStatusCallback& callback) {
+  MetadataDatabase::Create(
+      task_runner_.get(), database_path_,
+      base::Bind(&SyncEngineInitializer::DidCreateMetadataDatabase,
+                 weak_ptr_factory_.GetWeakPtr(), callback));
+}
+
+void SyncEngineInitializer::DidCreateMetadataDatabase(
+    const SyncStatusCallback& callback,
+    SyncStatusCode status,
+    scoped_ptr<MetadataDatabase> instance) {
+  if (status != SYNC_STATUS_OK) {
+    callback.Run(status);
+    return;
+  }
+
+  metadata_database_ = instance.Pass();
+
+  // TODO(tzik): Set up sync root and populate database with initial folder
+  // tree.
+
   NOTIMPLEMENTED();
   callback.Run(SYNC_STATUS_FAILED);
 }