Decompose //extensions/browser/BUILD.gn

extensions/browser/api/networking_private/BUILD.gn

+# Copyright 2016 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")
+
+source_set("networking_private") {
+  sources = [
+    "networking_private_api.cc",
+    "networking_private_api.h",
+    "networking_private_chromeos.cc",
+    "networking_private_chromeos.h",
+    "networking_private_delegate.cc",
+    "networking_private_delegate.h",
+    "networking_private_delegate_factory.cc",
+    "networking_private_delegate_factory.h",
+    "networking_private_delegate_observer.h",
+    "networking_private_event_router.h",
+    "networking_private_event_router_chromeos.cc",
+    "networking_private_event_router_factory.cc",
+    "networking_private_event_router_factory.h",
+  ]
+
+  deps = [
+    "//extensions/common/api",
+  ]
+
+  if (!is_chromeos && is_linux) {
+    sources += [
+      "network_config_dbus_constants_linux.cc",
+      "network_config_dbus_constants_linux.h",
+      "networking_private_event_router_nonchromeos.cc",
+      "networking_private_linux.cc",
+      "networking_private_linux.h",
+    ]
+    if (use_dbus) {
+      deps += [ "//dbus" ]
+    }
+  } else if (is_win || is_mac) {
+    sources += [
+      "networking_private_event_router_nonchromeos.cc",
+      "networking_private_service_client.cc",
+      "networking_private_service_client.h",
+    ]
+    deps += [ "//components/wifi" ]
+  }
+}