Fix GN missing headers in //base

components/url_formatter/elide_url_unittest.cc

Index: components/url_formatter/elide_url_unittest.cc
diff --git a/components/url_formatter/elide_url_unittest.cc b/components/url_formatter/elide_url_unittest.cc
index 56058fe78fb9701b9480881ef00cbd610bc18d3c..e8a92019f063fe528faf26ee4f30182ff2f0372f 100644
--- a/components/url_formatter/elide_url_unittest.cc
+++ b/components/url_formatter/elide_url_unittest.cc
@@ -6,7 +6,6 @@
 
 #include <stddef.h>
 
-#include "base/ios/ios_util.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ -21,6 +20,10 @@
 #include "ui/gfx/text_utils.h"  // nogncheck
 #endif
 
+#if defined(OS_IOS)
+#include "base/ios/ios_util.h"
+#endif
+
 namespace {
 
 struct Testcase {