Initialize and reset V4LocalDBManager. Instantiate V4Stores.

components/safe_browsing_db/v4_store.h

Index: components/safe_browsing_db/v4_store.h
diff --git a/components/safe_browsing_db/v4_store.h b/components/safe_browsing_db/v4_store.h
index be9ff9da954843a17fa8704f90d753b22d62bc3f..c1294c723101a5a09ff712cfd98ab473b3542db1 100644
--- a/components/safe_browsing_db/v4_store.h
+++ b/components/safe_browsing_db/v4_store.h
@@ -5,9 +5,26 @@
 #ifndef COMPONENTS_SAFE_BROWSING_DB_V4_STORE_H_
 #define COMPONENTS_SAFE_BROWSING_DB_V4_STORE_H_
 
+#include "base/files/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/sequenced_task_runner.h"
+
 namespace safe_browsing {
 
 class V4Store {
+ public:
+  // The |task_runner| is used to ensure that the operations in this file are
+  // performed on the correct thread. |store_path| specifies the location on
+  // disk for this file.
+  V4Store(const scoped_refptr<base::SequencedTaskRunner>& task_runner,
+          const base::FilePath& store_path);
+  virtual ~V4Store();
+
+  // Reset internal state and delete the backing file.
+  virtual bool Reset();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(V4Store);
 };
 
 }  // namespace safe_browsing