Add iOS10 helper to determine current running iOS version.

base/ios/ios_util.h

Index: base/ios/ios_util.h
diff --git a/base/ios/ios_util.h b/base/ios/ios_util.h
index 3b276ff79981736345605077f8727b85a99a07c1..fe9ec202c5db7ad9f0a65b4dc09c1b320c499a5d 100644
--- a/base/ios/ios_util.h
+++ b/base/ios/ios_util.h
@@ -19,6 +19,9 @@ BASE_EXPORT bool IsRunningOnIOS8OrLater();
 // Returns whether the operating system is iOS 9 or later.
 BASE_EXPORT bool IsRunningOnIOS9OrLater();
 
+// Returns whether the operating system is iOS 10 or later.
+BASE_EXPORT bool IsRunningOnIOS10OrLater();
+
 // Returns whether the operating system is at the given version or later.
 BASE_EXPORT bool IsRunningOnOrLater(int32_t major,
                                     int32_t minor,