[ObjC ARC] Converts ios/chrome/browser/ui/keyboard:unit_tests to ARC.Automatically generated ARCM…

ios/chrome/browser/ui/keyboard/UIKeyCommand+ChromeTest.mm

 // Copyright 2015 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 "ios/chrome/browser/ui/keyboard/UIKeyCommand+Chrome.h"
 
 #include "base/mac/scoped_nsobject.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 // Tests that UIApplication correctly calls the keyboard command action block
 // when invoked.
 TEST(UIKeyCommandChromeTest, UIApplicationHandleKeyCommand_CallsBlock) {
   __block BOOL called = NO;
   UIKeyCommand* command =
       [UIKeyCommand cr_keyCommandWithInput:@""
                              modifierFlags:Cr_UIKeyModifierNone
                                      title:nil
                                     action:^{
                                       called = YES;
                                     }];
   [[UIApplication sharedApplication] cr_handleKeyCommand:command];
   EXPECT_TRUE(called);
 }
 
 }  // namespace