Sort GN files under ui

For tools/sort_sources.py to be useful, existing GN files
should be sorted.

BUG=456014
TEST=everything should build as before

Review URL: https://codereview.chromium.org/928963002

Cr-Commit-Position: refs/heads/master@{#316719}

diff --git a/ui/aura/BUILD.gn b/ui/aura/BUILD.gn
index 4fe5f63..e032d67 100644
--- a/ui/aura/BUILD.gn
+++ b/ui/aura/BUILD.gn

@@ -7,6 +7,29 @@
 
 component("aura") {
   sources = [
+    "../wm/public/activation_change_observer.cc",
+    "../wm/public/activation_change_observer.h",
+    "../wm/public/activation_client.cc",
+    "../wm/public/activation_client.h",
+    "../wm/public/activation_delegate.cc",
+    "../wm/public/activation_delegate.h",
+    "../wm/public/animation_host.cc",
+    "../wm/public/animation_host.h",
+    "../wm/public/dispatcher_client.cc",
+    "../wm/public/dispatcher_client.h",
+    "../wm/public/drag_drop_client.cc",
+    "../wm/public/drag_drop_client.h",
+    "../wm/public/drag_drop_delegate.cc",
+    "../wm/public/drag_drop_delegate.h",
+    "../wm/public/scoped_tooltip_disabler.cc",
+    "../wm/public/scoped_tooltip_disabler.h",
+    "../wm/public/tooltip_client.cc",
+    "../wm/public/tooltip_client.h",
+    "../wm/public/transient_window_client.cc",
+    "../wm/public/transient_window_client.h",
+    "../wm/public/window_move_client.cc",
+    "../wm/public/window_move_client.h",
+    "../wm/public/window_types.h",
     "client/aura_constants.cc",
     "client/aura_constants.h",
     "client/capture_client.cc",
@@ -14,8 +37,8 @@
     "client/capture_delegate.h",
     "client/cursor_client.cc",
     "client/cursor_client.h",
-    "client/cursor_client_observer.h",
     "client/cursor_client_observer.cc",
+    "client/cursor_client_observer.h",
     "client/default_capture_client.cc",
     "client/default_capture_client.h",
     "client/event_client.cc",
@@ -47,9 +70,9 @@
     "scoped_window_targeter.h",
     "window.cc",
     "window.h",
+    "window_delegate.h",
     "window_event_dispatcher.cc",
     "window_event_dispatcher.h",
-    "window_delegate.h",
     "window_layer_type.h",
     "window_observer.cc",
     "window_observer.h",
@@ -59,36 +82,13 @@
     "window_tracker.h",
     "window_tree_host.cc",
     "window_tree_host.h",
-    "window_tree_host_mac.mm",
     "window_tree_host_mac.h",
+    "window_tree_host_mac.mm",
     "window_tree_host_observer.h",
     "window_tree_host_win.cc",
     "window_tree_host_win.h",
     "window_tree_host_x11.cc",
     "window_tree_host_x11.h",
-    "../wm/public/activation_change_observer.h",
-    "../wm/public/activation_change_observer.cc",
-    "../wm/public/activation_client.cc",
-    "../wm/public/activation_client.h",
-    "../wm/public/activation_delegate.cc",
-    "../wm/public/activation_delegate.h",
-    "../wm/public/animation_host.cc",
-    "../wm/public/animation_host.h",
-    "../wm/public/dispatcher_client.cc",
-    "../wm/public/dispatcher_client.h",
-    "../wm/public/drag_drop_client.cc",
-    "../wm/public/drag_drop_client.h",
-    "../wm/public/drag_drop_delegate.cc",
-    "../wm/public/drag_drop_delegate.h",
-    "../wm/public/scoped_tooltip_disabler.cc",
-    "../wm/public/scoped_tooltip_disabler.h",
-    "../wm/public/tooltip_client.cc",
-    "../wm/public/tooltip_client.h",
-    "../wm/public/transient_window_client.cc",
-    "../wm/public/transient_window_client.h",
-    "../wm/public/window_move_client.cc",
-    "../wm/public/window_move_client.h",
-    "../wm/public/window_types.h",
   ]
 
   defines = [ "AURA_IMPLEMENTATION" ]
@@ -163,12 +163,12 @@
     "test/test_focus_client.h",
     "test/test_screen.cc",
     "test/test_screen.h",
+    "test/test_window_delegate.cc",
+    "test/test_window_delegate.h",
     "test/test_window_tree_client.cc",
     "test/test_window_tree_client.h",
     "test/test_windows.cc",
     "test/test_windows.h",
-    "test/test_window_delegate.cc",
-    "test/test_window_delegate.h",
     "test/ui_controls_factory_aura.h",
     "test/window_event_dispatcher_test_api.cc",
     "test/window_event_dispatcher_test_api.h",