VR: Support loading string resources in unit tests.

chrome/browser/android/vr_shell/BUILD.gn

 # Copyright 2016 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("//chrome/common/features.gni")
 import("//device/vr/features/features.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
@@ skipping 183 matching lines @@
       "//chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellImpl.java",
     ]
     jni_package = "vr_shell"
   }
 }
 
 test("vr_common_unittests") {
   sources = [
     "fps_meter_unittest.cc",
     "gltf_parser_unittest.cc",
+    "run_all_unittests.cc",
     "test/paths.cc",
     "test/paths.h",
     "textures/close_button_texture_unittest.cc",
     "textures/url_bar_texture_unittest.cc",
     "ui_elements/exit_prompt_unittest.cc",
     "ui_elements/ui_element_unittest.cc",
     "ui_scene_manager_unittest.cc",
     "ui_scene_unittest.cc",
   ]
 
   deps = [
     ":vr_common",
-    "//base/test:run_all_unittests",
     "//base/test:test_support",
+    "//components:components_tests_pak",
     "//components/security_state/core",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/gfx:test_support",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
+  if (is_android) {

[sadrul, 2017/06/16 16:47:48]

This code is in chrome/browser/android/. If this builds on non-android
platforms, it should move elsewhere?

[cjgrant, 2017/06/16 17:42:03]

Indeed it should.  We're soon to migrate this out to chrome/browser/vr (you
actually suggested this location :).  The first steps were splitting out the
common library and getting the tests working across platforms, but we didn't
move the code because it would have created branch merge nightmares.  I expect
we'll move the code next week, now that M-60 merges are done.

Thanks for noticing this though, it means we have the right intentions.

+    deps += [ "//ui/android:ui_java" ]
+  }
+
   data = [
-    "test/data/sample_inline.gltf",
-    "test/data/sample_external.gltf",
-    "test/data/sample.bin",
-    "test/data/sample.glb",
+    "test/data/",
+    "$root_out_dir/components_tests_resources.pak",
   ]
 }