Rename sky::TestObserver to sky::TestHarness

sky/viewer/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("//mojo/public/tools/bindings/mojom.gni")
 
 shared_library("viewer") {
   output_name = "sky_viewer"
 
   sources = [
@@ skipping 60 matching lines @@
     "//third_party/icu",
     "//ui/native_theme",
     "//url",
     ":bindings",
     ":sky_modules",
   ]
 }
 
 mojom("bindings") {
   sources = [
-    "test_observer.mojom",
+    "services/test_harness.mojom",
     "services/tracing.mojom",
     "services/inspector.mojom",
   ]
 }
 
 copy("sky_modules") {
   sources = [
     "script/core.sky",
     "script/support.sky",
   ]
   outputs = [
     "$root_gen_dir/mojo/public/sky/{{source_file_part}}",
   ]
 }