Add viz-host HitTestQuery.

components/viz/host/BUILD.gn

 # Copyright 2017 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("//components/viz/viz.gni")
 
 viz_component("host") {
   defines = [ "VIZ_HOST_IMPLEMENTATION" ]
 
   sources = [
@@ skipping 31 matching lines @@
     "host_frame_sink_manager_unittests.cc",
     "server_gpu_memory_buffer_manager_unittest.cc",
   ]
 
   deps = [
     ":host",
     "//base",
     "//base/test:test_support",
     "//cc/ipc:interfaces",
     "//cc/surfaces",
+    "//components/viz/host/hit_test:unit_tests",
     "//gpu/ipc/host",
     "//mojo/public/cpp/bindings",
     "//services/ui/gpu/interfaces",
     "//testing/gmock",
     "//testing/gtest",
 
     # TODO(kylechar): This is temporary and will be removed when all host to
     # service communication is over Mojo.
     "//components/viz/service",
   ]
 }