cc: Add missing xdisplaycheck data dependency for tests.

cc/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("//testing/test.gni")
 
 component("cc") {
   sources = [
     "animation/animation.cc",
     "animation/animation.h",
@@ skipping 867 matching lines @@
     "//gpu/command_buffer/common:gles2_utils",
     "//media",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gfx:test_support",
     "//ui/gl",
   ]
+
+  if (use_x11) {
+    datadeps += [ "//tools/xdisplaycheck" ]

[danakj, 2015/03/05 18:38:39]

This seems as wrong as before, as per jamesr's comments

[sunnyps, 2015/03/05 20:44:45]

This is a datadep which in gn parlance means a run time dependency. BUILD.gn
doesn't have a separate target for running tests in an isolate, maybe a GN
expert can tell us what's the correct approach here. FWIW this is what
ui/base/BUILD.gn does.

+  }
 }
 
 test("cc_perftests") {
   sources = [
     "layers/layer_perftest.cc",
     "layers/picture_layer_impl_perftest.cc",
     "resources/picture_layer_tiling_perftest.cc",
     "resources/picture_pile_impl_perftest.cc",
     "resources/task_graph_runner_perftest.cc",
     "resources/tile_manager_perftest.cc",
@@ skipping 18 matching lines @@
     "//media",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }