[DevTools] Migrate chrome to devtools_discovery.

chrome/browser/devtools/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.
 
 if (!is_android) {
   import("//tools/grit/grit_rule.gni")
 }
 
 action("devtools_protocol_constants") {
   script = "devtools_protocol_constants_generator.py"
@@ skipping 59 matching lines @@
       "//chrome:strings",
       "//components/devtools_http_handler",
       "//net:http_server",
       "//skia",
       "//third_party/icu",
       "//third_party/leveldatabase",
       "//third_party/libusb",
       ":webrtc_device_provider_resources",
     ]
     sources += [
+      "chrome_devtools_discovery_provider.cc",
+      "chrome_devtools_discovery_provider.h",
       "chrome_devtools_manager_delegate.cc",
       "chrome_devtools_manager_delegate.h",
       "device/adb/adb_client_socket.cc",
       "device/adb/adb_client_socket.h",
       "device/adb/adb_device_provider.cc",
       "device/adb/adb_device_provider.h",
       "device/android_device_info_query.cc",
       "device/android_device_manager.cc",
       "device/android_device_manager.h",
       "device/android_web_socket.cc",
@@ skipping 49 matching lines @@
     source = "device/webrtc/resources.grd"
     output_dir = "$root_gen_dir/chrome"
     outputs = [
       "grit/webrtc_device_provider_resources.h",
       "grit/webrtc_device_provider_resources_map.cc",
       "grit/webrtc_device_provider_resources_map.h",
       "webrtc_device_provider_resources.pak",
     ]
   }
 }