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_data",
+    ":test_interfaces",
+  ]
+}
+
+action("test_data") {
+  script = "gen_data_files_list.py"
+  outputs = [
+    "$target_gen_dir/data_files.txt",

[yzshen1, 2017/03/22 17:39:34]

In addition to generating this data_files.txt, does it make sense to copy all
the validation test cases to gen/, and set explicit data deps GN rule on all
those files?

According to the discussion on https://codereview.chromium.org/2759803002, my
understanding is that people would like to only allow external data dependencies
in gen/ (rather than random places in the source tree outside of LayoutTests/).

+CC dpranke
Hi, Dirk. What do you think? Thanks!

+  ]
+  args = rebase_path([ "data/validation" ] + outputs, root_build_dir)
+}
+
 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",
   ]
 }