Add GN isolate support for a bunch of unittests.

sql/BUILD.gn

Index: sql/BUILD.gn
diff --git a/sql/BUILD.gn b/sql/BUILD.gn
index fdf8c7be96edba0cc4405c652c4d42ac8c29e6e0..38f85b4f26f72e6ae30a9f1f68cf0320b2f11a10 100644
--- a/sql/BUILD.gn
+++ b/sql/BUILD.gn
@@ -65,6 +65,15 @@ source_set("redirection_header") {
   ]
 }
 
+# TODO(GYP): Delete this after we've converted everything to GN.
+# The _run targets exist only for compatibility w/ GYP.
+group("sql_unittests_run") {
+  testonly = true
+  deps = [
+    ":sql_unittests",
+  ]
+}
+
 test("sql_unittests") {
   sources = [
     "connection_unittest.cc",
@@ -82,6 +91,10 @@ test("sql_unittests") {
     "transaction_unittest.cc",
   ]
 
+  data = [
+    "test/data/",
+  ]
+
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]