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

content/renderer/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/features.gni")
 import("//build/config/ui.gni")
 import("//content/renderer/renderer.gni")
 import("//media/media_options.gni")
 import("//third_party/webrtc/build/webrtc.gni")
 
@@ skipping 27 matching lines @@
     "//components/scheduler:scheduler",
     "//components/url_formatter",
     "//content:resources",
     "//content/child",
     "//content/common",
     "//content/gpu:gpu_sources",
     "//content/public/child:child_sources",
     "//content/public/common:common_sources",
     "//content/public/common:feature_h264_with_openh264_ffmpeg",
     "//content/public/common:features",
-    "//content/public/common:mojo_bindings",
     "//crypto:platform",
     "//device/battery:mojo_bindings",
     "//device/bluetooth",
     "//device/usb/public/interfaces",
     "//device/vibration:mojo_bindings",
     "//gin",
     "//gpu",
     "//gpu/command_buffer/client:gles2_interface",
     "//ipc/mojo",
     "//jingle:jingle_glue",
     "//media",
     "//media/blink",
     "//media/gpu",
     "//media/gpu/ipc/client",
     "//media/gpu/ipc/common",
     "//media/midi",
     "//mojo/common",
     "//mojo/converters/geometry",
     "//mojo/edk/js",
     "//mojo/public/cpp/bindings",
     "//mojo/public/js",
     "//net",
     "//sandbox",
     "//services/shell/public/cpp",
     "//services/shell/public/interfaces",
     "//skia",
     "//skia/public",
     "//storage/common",
     "//third_party/WebKit/public:blink",
+    "//third_party/WebKit/public:mojo_bindings",
     "//third_party/boringssl",
     "//third_party/icu",
     "//third_party/libjingle",
     "//third_party/libyuv",
     "//third_party/widevine/cdm:version_h",
     "//ui/accessibility",
     "//ui/base",
     "//ui/base/ime",
     "//ui/display",
     "//ui/events:dom_keycode_converter",
@@ skipping 171 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }