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

ios/chrome/browser/ui/toolbar/toolbar_model_impl_ios_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 <Foundation/Foundation.h>
 
 #include <memory>
 
-#include "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/test/bookmark_test_helpers.h"
 #include "components/toolbar/test_toolbar_model.h"
 #include "ios/chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #include "ios/chrome/browser/ui/toolbar/toolbar_model_delegate_ios.h"
 #include "ios/chrome/browser/ui/toolbar/toolbar_model_impl_ios.h"
 #include "ios/chrome/browser/web_state_list/fake_web_state_list_delegate.h"
 #include "ios/chrome/browser/web_state_list/web_state_list.h"
 #import "ios/chrome/browser/xcallback_parameters.h"
 #import "ios/shared/chrome/browser/ui/toolbar/toolbar_test_util.h"
 #import "ios/testing/ocmock_complex_type_helper.h"
 #import "ios/web/public/test/fakes/test_navigation_manager.h"
 #import "ios/web/public/test/fakes/test_web_state.h"
 #include "ios/web/public/test/test_web_thread.h"
 #include "ios/web/public/test/test_web_thread_bundle.h"
 #include "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #include "third_party/ocmock/gtest_support.h"
 #include "third_party/ocmock/ocmock_extensions.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 static const char kWebUrl[] = "http://www.chromium.org";
 static const char kNativeUrl[] = "chrome://version";
 
 class ToolbarModelImplIOSTest : public PlatformTest {
  protected:
   void SetUp() override {

[sdefresne, 2017/04/27 13:40:58]

Please add the missing call to PlatformTest::SetUp() here:

  void SetUp() override {
    PlatformTest::SetUp();
    ....
  }

[gambard, 2017/04/27 14:58:22]

Done.

     TestChromeBrowserState::Builder test_cbs_builder;
     chrome_browser_state_ = test_cbs_builder.Build();
     chrome_browser_state_->CreateBookmarkModel(true);
     bookmarks::test::WaitForBookmarkModelToLoad(
         ios::BookmarkModelFactory::GetForBrowserState(
             chrome_browser_state_.get()));
 
     // Create a WebStateList that will always return the test WebState as
     // the active WebState.
     web_state_list_ = base::MakeUnique<WebStateList>(&web_state_list_delegate_);
@@ skipping 105 matching lines @@
                              base::UTF8ToUTF16(kWebUrl), GURL(kWebUrl));
   EXPECT_TRUE(toolbarModel_->IsCurrentTabBookmarked());
 
   // Remove the bookmark and verify the toolbar model indicates that the URL is
   // not bookmarked.
   bookmark_model->Remove(node);
   EXPECT_FALSE(toolbarModel_->IsCurrentTabBookmarked());
 }
 
 }  // namespace