Skeleton of the overall design for the database for Pver4

components/safe_browsing_db/BUILD.gn

Index: components/safe_browsing_db/BUILD.gn
diff --git a/components/safe_browsing_db/BUILD.gn b/components/safe_browsing_db/BUILD.gn
index d36c5e5fdb2403de50011f6f71558aa4af951b88..1162e58773bfaebbdcbd3fa362af442eb45c8f3d 100644
--- a/components/safe_browsing_db/BUILD.gn
+++ b/components/safe_browsing_db/BUILD.gn
@@ -155,6 +155,30 @@ source_set("util") {
   }
 }
 
+source_set("v4_database") {
+  sources = [
+    "v4_database.cc",
+    "v4_database.h",
+  ]
+  deps = [
+    "//base",
+  ]
+}
+
+source_set("v4_database_impl") {
+  sources = [
+    "v4_database_impl.cc",
+    "v4_database_impl.h",
+  ]
+  public_deps = [
+    ":proto",
+  ]
+  deps = [
+    ":v4_database",
+    ":v4_protocol_manager_util",
+  ]
+}
+
 source_set("v4_get_hash_protocol_manager") {
   sources = [
     "v4_get_hash_protocol_manager.cc",
@@ -181,6 +205,8 @@ source_set("v4_local_database_manager") {
     ":database_manager",
     ":hit_report",
     ":proto",
+    ":v4_database",
+    ":v4_database_impl",
     ":v4_protocol_manager_util",
     ":v4_update_protocol_manager",
     "//base",