[PoC] Reformat all BUILD.gn and *.gni files with new gn.

components/proximity_auth/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("//testing/test.gni")
 
 source_set("proximity_auth") {
   sources = [
     "authenticator.h",
     "bluetooth_connection.cc",
@@ skipping 52 matching lines @@
     "switches.h",
     "throttled_bluetooth_connection_finder.cc",
     "throttled_bluetooth_connection_finder.h",
     "unlock_manager.cc",
     "unlock_manager.h",
     "wire_message.cc",
     "wire_message.h",
   ]
 
   deps = [
-    "cryptauth/proto",
-    "logging",
     "//base",
     "//device/bluetooth",
     "//net",
+    "cryptauth/proto",
+    "logging",
   ]
 }
 
 source_set("test_support") {
   testonly = true
 
   sources = [
     "device_to_device_responder_operations.cc",
     "device_to_device_responder_operations.h",
     "fake_connection.cc",
     "fake_connection.h",
     "fake_secure_context.cc",
     "fake_secure_context.h",
     "mock_proximity_auth_client.cc",
     "mock_proximity_auth_client.h",
     "proximity_auth_test_util.cc",
     "proximity_auth_test_util.h",
   ]
 
   deps = [
-    "cryptauth:test_support",
     "//base",
     "//testing/gmock",
+    "cryptauth:test_support",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "bluetooth_connection_finder_unittest.cc",
     "bluetooth_connection_unittest.cc",
     "bluetooth_throttler_impl_unittest.cc",
     "connection_unittest.cc",
@@ skipping 10 matching lines @@
     "throttled_bluetooth_connection_finder_unittest.cc",
     "unlock_manager_unittest.cc",
     "wire_message_unittest.cc",
   ]
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":proximity_auth",
     ":test_support",
+    "//base/test:test_support",
+    "//device/bluetooth:mocks",
+    "//testing/gmock",
+    "//testing/gtest",
     "ble:unit_tests",
     "cryptauth:test_support",
     "cryptauth:unit_tests",
     "logging:unit_tests",
-    "//base/test:test_support",
-    "//device/bluetooth:mocks",
-    "//testing/gmock",
-    "//testing/gtest",
   ]
 }
 
 # Note: This is a convenience target for ease of rapid iteration during
 # development. It is not executed on any try or build bots.
 test("proximity_auth_unittests") {
   sources = [
     "run_all_unittests.cc",
   ]
   deps = [
     ":unit_tests",
   ]
 }