XXX test gn format everything

tools/gn/BUILD.gn

Index: tools/gn/BUILD.gn
diff --git a/tools/gn/BUILD.gn b/tools/gn/BUILD.gn
index 3caae551a64a5040d491686d7b47232deb55b3d9..d04e1eceb67cef7ac3b6afdab504e1dba0959d39 100644
--- a/tools/gn/BUILD.gn
+++ b/tools/gn/BUILD.gn
@@ -186,7 +186,9 @@ action("last_commit_position") {
   script = "last_commit_position.py"
 
   # This dependency forces a re-run when the code is synced.
-  inputs = [ "//build/util/LASTCHANGE" ]
+  inputs = [
+    "//build/util/LASTCHANGE",
+  ]
 
   outfile = "$target_gen_dir/last_commit_position.h"
   outputs = [ outfile ]
@@ -269,6 +271,10 @@ test("gn_unittests") {
 }
 
 executable("generate_test_gn_data") {
-  sources = [ "generate_test_gn_data.cc" ]
-  deps = [ "//base" ]
+  sources = [
+    "generate_test_gn_data.cc",
+  ]
+  deps = [
+    "//base",
+  ]
 }