Convert //chrome/browser/sync_file_system from scoped_ptr to std::unique_ptr

chrome/browser/sync_file_system/drive_backend/metadata_database_index.h

Index: chrome/browser/sync_file_system/drive_backend/metadata_database_index.h
diff --git a/chrome/browser/sync_file_system/drive_backend/metadata_database_index.h b/chrome/browser/sync_file_system/drive_backend/metadata_database_index.h
index 406965245043dd9f3cc79c96bd30c96fc0b06f2e..688ae85ff8c3542711aa294a9fdcee4f8a53918a 100644
--- a/chrome/browser/sync_file_system/drive_backend/metadata_database_index.h
+++ b/chrome/browser/sync_file_system/drive_backend/metadata_database_index.h
@@ -58,17 +58,18 @@ class MetadataDatabaseIndex : public MetadataDatabaseIndexInterface {
  public:
   ~MetadataDatabaseIndex() override;
 
-  static scoped_ptr<MetadataDatabaseIndex> Create(LevelDBWrapper* db);
-  static scoped_ptr<MetadataDatabaseIndex> CreateForTesting(
-      DatabaseContents* contents, LevelDBWrapper* db);
+  static std::unique_ptr<MetadataDatabaseIndex> Create(LevelDBWrapper* db);
+  static std::unique_ptr<MetadataDatabaseIndex> CreateForTesting(
+      DatabaseContents* contents,
+      LevelDBWrapper* db);
 
   // MetadataDatabaseIndexInterface overrides.
   void RemoveUnreachableItems() override;
   bool GetFileMetadata(const std::string& file_id,
                        FileMetadata* metadata) const override;
   bool GetFileTracker(int64_t tracker_id, FileTracker* tracker) const override;
-  void StoreFileMetadata(scoped_ptr<FileMetadata> metadata) override;
-  void StoreFileTracker(scoped_ptr<FileTracker> tracker) override;
+  void StoreFileMetadata(std::unique_ptr<FileMetadata> metadata) override;
+  void StoreFileTracker(std::unique_ptr<FileTracker> tracker) override;
   void RemoveFileMetadata(const std::string& file_id) override;
   void RemoveFileTracker(int64_t tracker_id) override;
   TrackerIDSet GetFileTrackerIDsByFileID(
@@ -103,9 +104,10 @@ class MetadataDatabaseIndex : public MetadataDatabaseIndexInterface {
   std::vector<std::string> GetAllMetadataIDs() const override;
 
  private:
-  typedef base::ScopedPtrHashMap<std::string, scoped_ptr<FileMetadata>>
+  typedef base::ScopedPtrHashMap<std::string, std::unique_ptr<FileMetadata>>
       MetadataByID;
-  typedef base::ScopedPtrHashMap<int64_t, scoped_ptr<FileTracker>> TrackerByID;
+  typedef base::ScopedPtrHashMap<int64_t, std::unique_ptr<FileTracker>>
+      TrackerByID;
   typedef base::hash_map<std::string, TrackerIDSet> TrackerIDsByFileID;
   typedef base::hash_map<std::string, TrackerIDSet> TrackerIDsByTitle;
   typedef std::map<int64_t, TrackerIDsByTitle> TrackerIDsByParentAndTitle;
@@ -117,7 +119,7 @@ class MetadataDatabaseIndex : public MetadataDatabaseIndexInterface {
   friend class MetadataDatabaseTest;
 
   explicit MetadataDatabaseIndex(LevelDBWrapper* db);
-  void Initialize(scoped_ptr<ServiceMetadata> service_metadata,
+  void Initialize(std::unique_ptr<ServiceMetadata> service_metadata,
                   DatabaseContents* contents);
 
   // Maintains |app_root_by_app_id_|.
@@ -144,7 +146,7 @@ class MetadataDatabaseIndex : public MetadataDatabaseIndexInterface {
                                    const FileTracker& new_tracker);
   void RemoveFromDirtyTrackerIndexes(const FileTracker& tracker);
 
-  scoped_ptr<ServiceMetadata> service_metadata_;
+  std::unique_ptr<ServiceMetadata> service_metadata_;
   LevelDBWrapper* db_;  // Not owned
 
   MetadataByID metadata_by_id_;