gl_renderer_unittest: add missing include.

it's revealed when use_x11 && use_ozone config is used.

Change-Id: Ic09cd74a6b424d0430f4eb6bda1e0d8be1b9fd55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2372482Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Commit-Queue: Maksim Sisov (GMT+3) <msisov@igalia.com>
Cr-Commit-Position: refs/heads/master@{#800983}

components/viz/service/display/gl_renderer_unittest.cc

@@ -45,6 +45,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkMatrix.h"
 #include "third_party/skia/include/effects/SkColorMatrixFilter.h"
+#include "ui/base/ui_base_features.h"
 #include "ui/gfx/color_transform.h"
 #include "ui/gfx/transform.h"
 #include "ui/latency/latency_info.h"