Move some database tests next to the files they cover.

storage/browser/BUILD.gn

Index: storage/browser/BUILD.gn
diff --git a/storage/browser/BUILD.gn b/storage/browser/BUILD.gn
index 8fe7b80595676f65f3656f2e106c9d25aed9705e..019e852215b20b080052c5c2639fa63dacda79b1 100644
--- a/storage/browser/BUILD.gn
+++ b/storage/browser/BUILD.gn
@@ -232,6 +232,9 @@ test("storage_unittests") {
     "blob/blob_slice_unittest.cc",
     "blob/blob_storage_registry_unittest.cc",
     "blob/blob_transport_request_builder_unittest.cc",
+    "database/database_quota_client_unittest.cc",
+    "database/database_util_unittest.cc",
+    "database/databases_table_unittest.cc",
   ]
 
   deps = [
@@ -239,6 +242,7 @@ test("storage_unittests") {
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//net:test_support",
+    "//sql:test_support",
     "//testing/gtest",
   ]
 }