Cleanup GN BUILD files, gni's and imports.

mojo/services/network/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("//third_party/mojo/src/mojo/public/mojo_application.gni")
+import("//mojo/public/mojo_application.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 
   java_library_path = "$target_out_dir/java_library.dex.jar"
 
   mojo_android_application("network") {
     output_name = "network_service"
     input_so = "$root_out_dir/lib.stripped/libnetwork_service.so"
     input_dex_jar = java_library_path
@@ skipping 113 matching lines @@
     "//base",
     "//mojo/application/public/cpp:test_support",
     "//mojo/services/network/public/cpp",
     "//mojo/services/network/public/interfaces",
     "//net",
     "//net:test_support",
     "//testing/gtest",
     "//third_party/mojo/src/mojo/public/cpp/bindings:callback",
   ]
 }