Add ScopedMacRTL class for Cocoa browser RTL testing

ui/base/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("//build/buildflag_header.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
@@ skipping 108 matching lines @@
     "cocoa/menu_controller.h",
     "cocoa/menu_controller.mm",
     "cocoa/nib_loading.h",
     "cocoa/nib_loading.mm",
     "cocoa/nsgraphics_context_additions.h",
     "cocoa/nsgraphics_context_additions.mm",
     "cocoa/nsview_additions.h",
     "cocoa/nsview_additions.mm",
     "cocoa/remote_layer_api.h",
     "cocoa/remote_layer_api.mm",
+    "cocoa/rtl_feature.h",
+    "cocoa/rtl_feature.mm",
     "cocoa/scoped_cg_context_smooth_fonts.h",
     "cocoa/scoped_cg_context_smooth_fonts.mm",
     "cocoa/three_part_image.h",
     "cocoa/three_part_image.mm",
     "cocoa/tool_tip_base_view.h",
     "cocoa/tool_tip_base_view.mm",
     "cocoa/touch_bar_forward_declarations.h",
     "cocoa/tracking_area.h",
     "cocoa/tracking_area.mm",
     "cocoa/underlay_opengl_hosting_window.h",
@@ skipping 511 matching lines @@
     ]
   } else {
     sources += [
       "test/ios/keyboard_appearance_listener.h",
       "test/ios/keyboard_appearance_listener.mm",
       "test/ios/ui_view_test_utils.h",
       "test/ios/ui_view_test_utils.mm",
     ]
   }
 
-  if (is_mac) {
-    sources += [ "test/user_interactive_test_case_mac.mm" ]
-  } else {
-    sources += [ "test/user_interactive_test_case.cc" ]
-  }
-
   public_deps = [
     ":base",
   ]
   deps = [
     "//base",
     "//base/test:test_config",
     "//skia",
     "//testing/gtest",
     "//ui/base:ui_data_pack",
     "//ui/events:events_base",
     "//ui/events:test_support",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
+  if (is_mac) {
+    sources += [
+      "test/scoped_mac_rtl.h",
+      "test/scoped_mac_rtl.mm",

[tapted, 2016/12/07 23:20:27]

(maybe it's historical but..) the current convention is to list files in the
main `sources = [` list "if that works". I think this will, since it is .mm, but
the _mac should be at the end anyways (see next comment), which will make it
even more workier.  (the deps below should stay here, however)

Edit: maybe it's here because of iOS -- see comment in scoped_mac_rtl.h

+      "test/user_interactive_test_case_mac.mm",
+    ]
+
+    deps += [
+      "//base:i18n",
+      "//base/test:test_support",
+    ]
+  } else {
+    sources += [ "test/user_interactive_test_case.cc" ]
+  }
+
   if (build_ime) {
     sources += [
       "ime/dummy_input_method.cc",
       "ime/dummy_input_method.h",
       "ime/dummy_text_input_client.cc",
       "ime/dummy_text_input_client.h",
     ]
 
     deps += [
       "//ui/base/ime",
@@ skipping 268 matching lines @@
 if (is_mac) {
   mac_framework_bundle("ui_unittests_framework") {
     testonly = true
     deps = [
       "//ui/resources:ui_test_pak_bundle_data",
     ]
     info_plist = "test/framework-Info.plist"
     output_name = "ui_unittests Framework"
   }
 }