Add viz-host HitTestQuery.

components/viz/common/hit_test/BUILD.gn

Index: components/viz/common/hit_test/BUILD.gn
diff --git a/components/viz/common/hit_test/BUILD.gn b/components/viz/common/hit_test/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..9bcbba74985725f49370b1bdf9fb6e1c54b2620b
--- /dev/null
+++ b/components/viz/common/hit_test/BUILD.gn
@@ -0,0 +1,15 @@
+# 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.
+
+source_set("hit_test_common") {
+  sources = [
+    "components/viz/common/display_hit_test_data.h",
+  ]
+
+  public_deps = [
+    "//cc/surfaces:surface_id",
+    "//ui/gfx",
+    "//ui/gfx/geometry",
+  ]
+}