Support XCode's "Right to Left Pseudolanguage" on iOS.

base/ios/ios_util.mm

Index: base/ios/ios_util.mm
diff --git a/base/ios/ios_util.mm b/base/ios/ios_util.mm
index d9200450950aeee977568d104b245b807c96e164..c86d11f9a6bdfc8d40c923c0fb2e2e2f3c109955 100644
--- a/base/ios/ios_util.mm
+++ b/base/ios/ios_util.mm
@@ -4,6 +4,8 @@
 
 #include "base/ios/ios_util.h"
 
+#import <Foundation/Foundation.h>
+
 #include "base/sys_info.h"
 
 namespace {
@@ -39,5 +41,10 @@ bool IsRunningOnOrLater(int32 major, int32 minor, int32 bug_fix) {
   return true;
 }
 
+bool IsForcingRTL() {
+  NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
+  return [defaults boolForKey:@"AppleTextDirection"];
+}
+
 }  // namespace ios
 }  // namespace base