Add database recovery for FileSystemOriginDatabase

webkit/fileapi/file_system_origin_database.h

Index: webkit/fileapi/file_system_origin_database.h
diff --git a/webkit/fileapi/file_system_origin_database.h b/webkit/fileapi/file_system_origin_database.h
index ac729dfbf50d9433fb64328a4409510987fd96ce..354fef178fd3065c412e876ca6072ead73564a8f 100644
--- a/webkit/fileapi/file_system_origin_database.h
+++ b/webkit/fileapi/file_system_origin_database.h
@@ -23,6 +23,11 @@ namespace fileapi {
 // the browser's FILE thread.  The constructor may be used on any thread.
 class FileSystemOriginDatabase {
  public:
+  enum RecoveringOption {
+    REBUILD_ON_CORRUPTION,
+    LEAVE_ON_CORRUPTION,
+  };
+
   struct OriginRecord {
     std::string origin;
     FilePath path;
@@ -52,7 +57,7 @@ class FileSystemOriginDatabase {
   void DropDatabase();
 
  private:
-  bool Init();
+  bool Init(RecoveringOption recovering_option);
   void HandleError(const tracked_objects::Location& from_here,
                    leveldb::Status status);
   bool GetLastPathNumber(int* number);