Apply gn format with 'sources' sorting to src/

jingle/BUILD.gn

Index: jingle/BUILD.gn
diff --git a/jingle/BUILD.gn b/jingle/BUILD.gn
index d99f384d3fe2b3a1554beefebc7c9da8ec5a2f9f..65ffd1ce216c26929d41163a73bca1fe38c5c602 100644
--- a/jingle/BUILD.gn
+++ b/jingle/BUILD.gn
@@ -35,8 +35,8 @@ if (enable_webrtc || !is_android) {
       "notifier/base/gaia_constants.h",
       "notifier/base/gaia_token_pre_xmpp_auth.cc",
       "notifier/base/gaia_token_pre_xmpp_auth.h",
-      "notifier/base/notification_method.h",
       "notifier/base/notification_method.cc",
+      "notifier/base/notification_method.h",
       "notifier/base/notifier_options.cc",
       "notifier/base/notifier_options.h",
       "notifier/base/notifier_options_util.cc",
@@ -61,10 +61,10 @@ if (enable_webrtc || !is_android) {
       "notifier/listener/notification_constants.h",
       "notifier/listener/notification_defines.cc",
       "notifier/listener/notification_defines.h",
-      "notifier/listener/push_client_observer.cc",
-      "notifier/listener/push_client_observer.h",
       "notifier/listener/push_client.cc",
       "notifier/listener/push_client.h",
+      "notifier/listener/push_client_observer.cc",
+      "notifier/listener/push_client_observer.h",
       "notifier/listener/push_notifications_listen_task.cc",
       "notifier/listener/push_notifications_listen_task.h",
       "notifier/listener/push_notifications_send_update_task.cc",
@@ -182,8 +182,8 @@ if (enable_webrtc || !is_android) {
     sources = [
       "notifier/base/gaia_constants.cc",
       "notifier/base/gaia_constants.h",
-      "notifier/base/notification_method.h",
       "notifier/base/notification_method.cc",
+      "notifier/base/notification_method.h",
       "notifier/base/notifier_options.cc",
       "notifier/base/notifier_options.h",
     ]