Rework how isolates are generated in MB.

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/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 609 matching lines @@
       "../android/java/src/org/chromium/ui/base/DeviceFormFactor.java",
       "../android/java/src/org/chromium/ui/base/LocalizationUtils.java",
       "../android/java/src/org/chromium/ui/base/ResourceBundle.java",
       "../android/java/src/org/chromium/ui/base/SelectFileDialog.java",
       "../android/java/src/org/chromium/ui/base/TouchDevice.java",
     ]
     jni_package = "base"
   }
 }
 
+#
+# TODO(GYP): Delete this after we've converted everything to GN.
+# The _run targets exist only for compatibility w/ GYP.
+group("ui_base_unittests_run") {
+  testonly = true
+  deps = [
+    ":ui_base_unittests",
+  ]
+}
+
 # GYP version: ui/base/ui_base_tests.gyp:ui_base_unittests
 test("ui_base_unittests") {
   sources = [
     "ios/cru_context_menu_controller_unittest.mm",
     "l10n/l10n_util_mac_unittest.mm",
     "l10n/l10n_util_unittest.cc",
     "l10n/l10n_util_win_unittest.cc",
     "l10n/time_format_unittest.cc",
     "layout_unittest.cc",
     "models/tree_node_iterator_unittest.cc",
     "resource/data_pack_literal.cc",
     "resource/data_pack_unittest.cc",
     "resource/material_design/material_design_controller_unittest.cc",
     "resource/resource_bundle_unittest.cc",
     "template_expressions_unittest.cc",
     "test/run_all_unittests.cc",
     "test/scoped_fake_nswindow_fullscreen_unittest.mm",
     "test/test_clipboard_unittest.cc",
     "user_activity/user_activity_detector_unittest.cc",
   ]
 
+  data = []
+  data_deps = []
+
   if (is_android) {
     sources -= [ "user_activity/user_activity_detector_unittest.cc" ]
   }
 
   if (is_ios) {
     # Compile this Mac file on iOS as well.
     set_sources_assignment_filter([])
     sources += [ "l10n/l10n_util_mac_unittest.mm" ]
     set_sources_assignment_filter(sources_assignment_filter)
   } else {  # !is_ios
@@ skipping 116 matching lines @@
   if (use_x11) {
     sources += [ "cursor/cursor_loader_x11_unittest.cc" ]
 
     configs += [ "//build/config/linux:x11" ]
 
     deps += [
       "//ui/events/platform/x11",
       "//ui/gfx/x",
     ]
 
-    datadeps = [
-      "//tools/xdisplaycheck",
-    ]
+    data_deps += [ "//tools/xdisplaycheck" ]
   }
 
   if (is_mac) {
     deps += [
       "//third_party/mozilla",
       #'ui_base_tests_bundle',  TODO(GYP)
     ]
   }
 
   if (use_aura || toolkit_views) {
@@ skipping 11 matching lines @@
       "x/selection_requestor_unittest.cc",
     ]
   }
 
   if (is_chromeos) {
     deps += [
       "//chromeos",
       "//ui/events:dom_keycode_converter",
     ]
   }
+
+  if (is_linux || is_mac || is_win) {
+    # TODO(brettw): We should be able to depend on //ui/resources:ui_test_pak
+    # instead of depending directly on the non-test .pak files, but depending
+    # on ui_test_pak seems to have no effect.
+    data += [
+      "test/data/data_pack_unittest/truncated-header.pak",
+      "$root_out_dir/ui_test.pak",  # TODO(brettw): remove this line.
+    ]
+    data_deps += [
+      "//ui/resources:ui_test_pak",  # TODO(brettw): this does nothing.
+      "//third_party/mesa:osmesa",
+    ]
+  }
+  if (is_linux || is_win) {
+    data += [
+      # TODO(brettw): Remove these two lines.
+      "$root_out_dir/ui/en-US.pak",
+      "$root_gen_dir/ui/resources/ui_resources_100_percent.pak",
+    ]
+  }
+  if (is_mac) {
+    data += [ "$root_out_dir/ui_unittests Framework.framework/" ]
+
+    if (use_asan && symbol_level == 0) {
+      data += [ "$root_out_dir/ui_base_unittests.dSYM/" ]
+    }
+  }
 }
 # TODO(GYP) Mac (ui_base_tests_bundle)