[OnionSoup] Move background_sync.mojom from //content to //third_party/WebKit

content/test/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/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/v8.gni")
@@ skipping 632 matching lines @@
     "//content/browser/cache_storage:cache_storage_proto",
     "//content/browser/notifications:notification_proto",
     "//content/browser/service_worker:service_worker_proto",
     "//content/browser/speech/proto",
     "//content/child:for_content_tests",
     "//content/common:mojo_bindings",
     "//content/gpu",
     "//content/public/browser",
     "//content/public/child",
     "//content/public/common",
-    "//content/public/common:mojo_bindings",
     "//content/public/renderer",
     "//content/renderer:for_content_tests",
     "//crypto",
     "//device/battery",
     "//device/battery:mojo_bindings",
     "//device/bluetooth",
     "//device/bluetooth:mocks",
     "//gin",
     "//gpu",
     "//gpu:test_support",
@@ skipping 10 matching lines @@
     "//ppapi/c",
     "//printing",
     "//skia",
     "//sql",
     "//sql:test_support",
     "//storage/browser",
     "//storage/common",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/WebKit/public:blink",
+    "//third_party/WebKit/public:mojo_bindings",
     "//third_party/icu",
     "//third_party/leveldatabase",
     "//third_party/libjingle",
     "//third_party/re2",
     "//third_party/widevine/cdm:version_h",
     "//ui/accessibility",
     "//ui/base:test_support",
     "//ui/compositor:test_support",
     "//ui/display",
     "//ui/display:test_support",
@@ skipping 200 matching lines @@
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }