[ObjC ARC] Converts ios/chrome/browser/ui/toolbar:unit_tests to ARC.

ios/chrome/browser/ui/toolbar/web_toolbar_controller_unittest.mm

 // Copyright 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 "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
 
 #import <Foundation/Foundation.h>
 
 #include <memory>
 
 #include "base/ios/ios_util.h"
-#include "base/mac/scoped_nsobject.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #import "ios/chrome/browser/ui/toolbar/test_toolbar_model_ios.h"
 #import "ios/chrome/browser/ui/toolbar/web_toolbar_controller_private.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #include "ios/chrome/test/block_cleanup_test.h"
 #include "ios/web/public/test/test_web_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface UIView (SubViewTesting)
 - (NSMutableArray*)allSubviews;
 @end
 
 @implementation UIView (SubViewTesting)
 - (NSMutableArray*)allSubviews {
   NSMutableArray* views = [NSMutableArray array];
   [views addObject:self];
   for (UIView* subview in [self subviews]) {
     [views addObjectsFromArray:[subview allSubviews]];
@@ skipping 27 matching lines @@
     // fine if a temporary variable is used.
     ToolbarModelIOS* model_for_mock = toolbar_model_ios_.get();
     id delegate =
         [OCMockObject niceMockForProtocol:@protocol(WebToolbarDelegate)];
     [[[delegate stub] andReturnValue:OCMOCK_VALUE(model_for_mock)]
         toolbarModelIOS];
 
     id urlLoader = [OCMockObject niceMockForProtocol:@protocol(UrlLoader)];
 
     // Create the WebToolbarController using the test objects.
-    web_toolbar_controller_.reset([[WebToolbarController alloc]
+    web_toolbar_controller_ = [[WebToolbarController alloc]
         initWithDelegate:delegate
                urlLoader:urlLoader
             browserState:chrome_browser_state_.get()
-         preloadProvider:nil]);
+         preloadProvider:nil];
     [web_toolbar_controller_ setUnitTesting:YES];
   }
   void TearDown() override {
-    web_toolbar_controller_.reset();
+    web_toolbar_controller_ = nil;
     BlockCleanupTest::TearDown();
   }
 
   web::TestWebThreadBundle thread_bundle_;
   std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
   TestToolbarModel* toolbar_model_;  // weak. Owned by toolbar_model_ios_.
   std::unique_ptr<TestToolbarModelIOS> toolbar_model_ios_;
-  base::scoped_nsobject<WebToolbarController> web_toolbar_controller_;
+  WebToolbarController* web_toolbar_controller_;
 };
 
 TEST_F(WebToolbarControllerTest, TestUpdateToolbar_NavigationButtonsEnabled) {
   EXPECT_FALSE([web_toolbar_controller_ isForwardButtonEnabled]);
   EXPECT_FALSE([web_toolbar_controller_ isBackButtonEnabled]);
   toolbar_model_ios_->set_can_go_back(true);
   toolbar_model_ios_->set_can_go_forward(true);
   [web_toolbar_controller_ updateToolbarState];
   EXPECT_TRUE([web_toolbar_controller_ isForwardButtonEnabled]);
   EXPECT_TRUE([web_toolbar_controller_ isBackButtonEnabled]);
@@ skipping 113 matching lines @@
     CGRect initialRect = initialIt->second;
     CGRect layoutRect = postLayoutIt->second;
     EXPECT_EQ(initialRect.origin.x, layoutRect.origin.x);
     EXPECT_EQ(initialRect.origin.y, layoutRect.origin.y);
     EXPECT_EQ(initialRect.size.width, layoutRect.size.width);
     EXPECT_EQ(initialRect.size.height, layoutRect.size.height);
     initialIt++;
   }
 }
 }  // namespace