Remove IsRunningOnIOS6OrLater

base/ios/device_util_unittest.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <UIKit/UIKit.h>
 
 #include "base/ios/device_util.h"
 #include "base/ios/ios_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 34 matching lines @@
 TEST_F(DeviceUtilTest, GetDeviceIdentifier) {
   CleanNSUserDefaultsForDeviceId();
 
   std::string default_id = ios::device_util::GetDeviceIdentifier(NULL);
   std::string other_id = ios::device_util::GetDeviceIdentifier("ForTest");
   EXPECT_NE(default_id, other_id);
 
   CleanNSUserDefaultsForDeviceId();
 
   std::string new_default_id = ios::device_util::GetDeviceIdentifier(NULL);
-  if (base::ios::IsRunningOnIOS6OrLater() &&
-      ![[[[UIDevice currentDevice] identifierForVendor] UUIDString]
+  if (![[[[UIDevice currentDevice] identifierForVendor] UUIDString]
           isEqualToString:@"00000000-0000-0000-0000-000000000000"]) {
     EXPECT_EQ(default_id, new_default_id);
   } else {
     EXPECT_NE(default_id, new_default_id);
   }
 
   CleanNSUserDefaultsForDeviceId();
 }
 
 TEST_F(DeviceUtilTest, CheckMigration) {
@@ skipping 69 matching lines @@
   std::string base_id = ios::device_util::GetDeviceIdentifier(NULL);
   [defaults setObject:@"Foo" forKey:@"ClientIDGenerationHardwareType"];
   [defaults synchronize];
   std::string new_id = ios::device_util::GetDeviceIdentifier(NULL);
   EXPECT_NE(new_id, base_id);
 
   CleanNSUserDefaultsForDeviceId();
 }
 
 }  // namespace