Moving mojo/validation test into LayoutTests

mojo/public/interfaces/bindings/tests/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("../../../tools/bindings/mojom.gni")
 
+group("tests") {
+  testonly = true
+  deps = [
+    ":test_interfaces",
+    ":validation_test_data",

[alokp, 2017/03/27 01:50:09]

nit: Would it make sense to create a single target - "test_data" - that does
both - generate data file list and copy those files?

+    ":validation_test_data_list",
+  ]
+}
+
+action("validation_test_data_list") {
+  script = "//mojo/public/tools/bindings/gen_data_files_list.py"
+  sources = [
+    "data/validation",
+  ]
+  outputs = [
+    "$target_gen_dir/validation_files.txt",
+  ]
+  args = [
+    "-d",
+    rebase_path("data/validation", root_build_dir),
+    "-o",
+    rebase_path(outputs[0], root_build_dir),
+  ]
+}
+
+copy("validation_test_data") {
+  sources = [
+    "data/validation",
+  ]
+  outputs = [
+    "$target_gen_dir/data/{{source_file_part}}",
+  ]
+}
+
 mojom("test_interfaces") {
   testonly = true
   sources = [
     "math_calculator.mojom",
     "no_module.mojom",
     "ping_service.mojom",
     "rect.mojom",
     "regression_tests.mojom",
     "sample_factory.mojom",
     "sample_interfaces.mojom",
@@ skipping 174 matching lines @@
   ]
 }
 
 mojom("test_no_sources") {
   testonly = true
 
   public_deps = [
     ":test_interfaces",
   ]
 }