XXX test gn format everything

ui/accessibility/BUILD.gn

Index: ui/accessibility/BUILD.gn
diff --git a/ui/accessibility/BUILD.gn b/ui/accessibility/BUILD.gn
index a95527f2196c682d3a7cef8ec80c578c9077b7d8..296af4fafe347691417a93d785b9c42b0788127b 100644
--- a/ui/accessibility/BUILD.gn
+++ b/ui/accessibility/BUILD.gn
@@ -45,11 +45,11 @@ component("accessibility") {
 source_set("test_support") {
   sources = [
     "tree_generator.cc",
-    "tree_generator.h"
+    "tree_generator.h",
   ]
 
   deps = [
-    ":accessibility"
+    ":accessibility",
   ]
 }
 
@@ -72,8 +72,12 @@ test("accessibility_unittests") {
 }
 
 json_schema_api("ax_gen") {
-  sources = [ "ax_enums.idl" ]
-  deps = [ "//base/third_party/dynamic_annotations" ]
+  sources = [
+    "ax_enums.idl",
+  ]
+  deps = [
+    "//base/third_party/dynamic_annotations",
+  ]
   root_namespace = "ui"
   schemas = true
 }