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

ios/chrome/browser/suggestions/ios_image_decoder_impl_unittest.mm

 // Copyright 2011 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/suggestions/ios_image_decoder_impl.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 #include "ui/gfx/image/image.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 static unsigned char kJPGImage[] = {
     255, 216, 255, 224, 0,   16,  74,  70, 73, 70, 0,   1,   1,   1,   0,
     72,  0,   72,  0,   0,   255, 254, 0,  19, 67, 114, 101, 97,  116, 101,
     100, 32,  119, 105, 116, 104, 32,  71, 73, 77, 80,  255, 219, 0,   67,
     0,   5,   3,   4,   4,   4,   3,   5,  4,  4,  4,   5,   5,   5,   6,
     7,   12,  8,   7,   7,   7,   7,   15, 11, 11, 9,   12,  17,  15,  18,
     18,  17,  15,  17,  17,  19,  22,  28, 23, 19, 20,  26,  21,  17,  17,
     24,  33,  24,  26,  29,  29,  31,  31, 31, 19, 23,  34,  36,  34,  30,
@@ skipping 68 matching lines @@
       image_data, base::Bind(&IOSImageDecoderImplTest::OnImageDecoded,
                              base::Unretained(this)));
 
   pool_->FlushForTesting();
   base::RunLoop().RunUntilIdle();
 
   EXPECT_FALSE(decoded_image_.IsEmpty());
 }
 
 }  // namespace suggestions