Convert ozone/drm DisplaySnapshot_Param to DisplaySnapshotMojo

ui/ozone/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("//ui/ozone/ozone.gni")
 import("//ui/ozone/ozone_extra.gni")
 import("//testing/test.gni")
 
 assert(use_ozone)
@@ skipping 205 matching lines @@
 }
 
 test("ozone_unittests") {
   sources = [
     "run_all_unittests.cc",
   ]
 
   deps = [
     "//base/test:test_support",
     "//testing/gtest",
+    "//ui/gfx:test_support",
     "//ui/gfx/geometry",
   ]
 
   # Add tests of platform internals.
   deps += ozone_platform_test_deps
 
   # Platform tests link ozone statically. Make sure we're not getting a
   # 2nd copy of any code via the component.
   assert_no_deps = [ "//ui/ozone" ]
 }