[ObjC ARC] Converts components/translate/ios/browser:unit_tests to ARC.

components/translate/ios/browser/translate_controller_unittest.mm

 // Copyright 2014 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 "components/translate/ios/browser/translate_controller.h"
 
 #include <memory>
 
+#include "base/memory/ptr_util.h"
 #include "base/values.h"
 #import "components/translate/ios/browser/js_translate_manager.h"
 #import "ios/web/public/test/fakes/test_web_state.h"
 #include "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace translate {
 
 class TranslateControllerTest : public PlatformTest,
                                 public TranslateController::Observer {
  protected:
   TranslateControllerTest()
       : test_web_state_(new web::TestWebState),
         success_(false),
         ready_time_(0),
         load_time_(0),
         translation_time_(0),
         on_script_ready_called_(false),
         on_translate_complete_called_(false) {
-    mock_js_translate_manager_.reset(
-        [[OCMockObject niceMockForClass:[JsTranslateManager class]] retain]);
-    translate_controller_.reset(new TranslateController(
-        test_web_state_.get(), mock_js_translate_manager_));
+    mock_js_translate_manager_ =
+        [OCMockObject niceMockForClass:[JsTranslateManager class]];
+    translate_controller_ = base::MakeUnique<TranslateController>(
+        test_web_state_.get(), mock_js_translate_manager_);
     translate_controller_->set_observer(this);
   }
 
   // TranslateController::Observer methods.
   void OnTranslateScriptReady(bool success,
                               double load_time,
                               double ready_time) override {
     on_script_ready_called_ = true;
     success_ = success;
     load_time_ = load_time;
     ready_time_ = ready_time;
   }
 
   void OnTranslateComplete(bool success,
                            const std::string& original_language,
                            double translation_time) override {
     on_translate_complete_called_ = true;
     success_ = success;
     original_language_ = original_language;
     translation_time_ = translation_time;
   }
 
   std::unique_ptr<web::TestWebState> test_web_state_;
-  base::scoped_nsobject<id> mock_js_translate_manager_;
+  id mock_js_translate_manager_;
   std::unique_ptr<TranslateController> translate_controller_;
   bool success_;
   double ready_time_;
   double load_time_;
   std::string original_language_;
   double translation_time_;
   bool on_script_ready_called_;
   bool on_translate_complete_called_;
 };
 
@@ skipping 68 matching lines @@
   command.SetString("command", "translate.status");
   command.SetBoolean("success", false);
   EXPECT_TRUE(translate_controller_->OnJavascriptCommandReceived(
       command, GURL("http://google.com"), false));
   EXPECT_FALSE(on_script_ready_called_);
   EXPECT_TRUE(on_translate_complete_called_);
   EXPECT_FALSE(success_);
 }
 
 }  // namespace translate