Cleanup GN BUILD files, gni's and imports.

components/html_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("//build/module_args/v8.gni")
 import("//mojo/mojo_application_package.gni")
+import("//mojo/public/mojo_application.gni")
 import("//testing/test.gni")
-import("//third_party/mojo/src/mojo/public/mojo.gni")
-import("//third_party/mojo/src/mojo/public/mojo_application.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
 # Repack this here.
 repack("unified_blink_resources") {
   sources = [
     "$root_gen_dir/blink/public/resources/blink_image_resources_100_percent.pak",
     "$root_gen_dir/blink/public/resources/blink_resources.pak",
   ]
   output = "$target_gen_dir/unified_blink_resources.pak"
@@ skipping 206 matching lines @@
     "//base",
     "//mojo/application/public/cpp:test_support",
     "//net:test_support",
     "//testing/gtest",
     "//third_party/mojo_services/src/accessibility/public/interfaces",
     "//third_party/mojo/src/mojo/public/c/system:for_shared_library",
   ]
 
   data_deps = [ ":html_viewer" ]
 }