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

ios/chrome/browser/ui/omnibox_perftest.mm

 // Copyright (c) 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 <UIKit/UIKit.h>
 
 #include <memory>
 
-#include "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #import "base/test/ios/wait_util.h"
 #include "base/time/time.h"
 #include "components/toolbar/test_toolbar_model.h"
 #include "ios/chrome/browser/autocomplete/autocomplete_classifier_factory.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
 #import "ios/chrome/browser/ui/omnibox/omnibox_text_field_ios.h"
 #include "ios/chrome/browser/ui/toolbar/toolbar_model_delegate_ios.h"
 #include "ios/chrome/browser/ui/toolbar/toolbar_model_impl_ios.h"
 #import "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
 #include "ios/chrome/test/base/perf_test_ios.h"
 #include "ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.h"
 #include "ios/shared/chrome/browser/tabs/web_state_list.h"
 #include "ios/web/public/test/fakes/test_web_state.h"
 #include "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "ui/base/test/ios/keyboard_appearance_listener.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 // Descends down a view hierarchy until the first view of |specificClass|
 // is found. Returns nil if a view of |specificClass| cannot be found.
 UIView* FindViewByClass(UIView* topView, Class specificClass) {
   if ([topView isKindOfClass:specificClass])
     return [topView window] ? topView : nil;
   for (UIView* subview in [topView subviews]) {
     UIView* foundView = FindViewByClass(subview, specificClass);
     if (foundView)
@@ skipping 19 matching lines @@
     test_cbs_builder.AddTestingFactory(
         ios::AutocompleteClassifierFactory::GetInstance(),
         ios::AutocompleteClassifierFactory::GetDefaultFactory());
     chrome_browser_state_ = test_cbs_builder.Build();
 
     // Prepares testing profile for autocompletion.
     ios::AutocompleteClassifierFactory::GetForBrowserState(
         chrome_browser_state_.get());
 
     // Sets up the listener for keyboard activation/deactivation notifications.
-    keyboard_listener_.reset([[KeyboardAppearanceListener alloc] init]);
+    keyboard_listener_ = [[KeyboardAppearanceListener alloc] init];
 
     // Create a real window to host the Toolbar.
     CGRect screenBounds = [[UIScreen mainScreen] bounds];
-    window_.reset([[UIWindow alloc] initWithFrame:screenBounds]);
+    window_ = [[UIWindow alloc] initWithFrame:screenBounds];
     [window_ makeKeyAndVisible];
 
     // Create a WebStateList that will always return the test WebState as
     // the active WebState.
     web_state_list_ = base::MakeUnique<WebStateList>(&web_state_list_delegate_);
     std::unique_ptr<web::TestWebState> web_state =
         base::MakeUnique<web::TestWebState>();
     web_state_list_->InsertWebState(0, std::move(web_state));
 
     // Creates the Toolbar for testing and sizes it to the width of the screen.
     toolbar_model_delegate_.reset(
         new ToolbarModelDelegateIOS(web_state_list_.get()));
     toolbar_model_ios_.reset(
         new ToolbarModelImplIOS(toolbar_model_delegate_.get()));
 
     // The OCMOCK_VALUE macro doesn't like std::unique_ptr, but it works just
     // fine if a temporary variable is used.
     ToolbarModelIOS* model_for_mock = toolbar_model_ios_.get();
     id webToolbarDelegate =
         [OCMockObject niceMockForProtocol:@protocol(WebToolbarDelegate)];
     [[[webToolbarDelegate stub] andReturnValue:OCMOCK_VALUE(model_for_mock)]
         toolbarModelIOS];
     id urlLoader = [OCMockObject niceMockForProtocol:@protocol(UrlLoader)];
-    toolbar_.reset([[WebToolbarController alloc]
+    toolbar_ = [[WebToolbarController alloc]
         initWithDelegate:webToolbarDelegate
                urlLoader:urlLoader
             browserState:chrome_browser_state_.get()
-         preloadProvider:nil]);
+         preloadProvider:nil];
     UIView* toolbarView = [toolbar_ view];
     CGRect toolbarFrame = toolbarView.frame;
     toolbarFrame.origin = CGPointZero;
     toolbarFrame.size.width = screenBounds.size.width;
     toolbarView.frame = toolbarFrame;
     // Add toolbar to window.
     [window_ addSubview:toolbarView];
     base::test::ios::WaitUntilCondition(^bool() {
-      return IsToolbarLoaded(window_.get());
+      return IsToolbarLoaded(window_);
     });
   }
 
   void TearDown() override {
     // Remove toolbar from window.
     [[toolbar_ view] removeFromSuperview];
     base::test::ios::WaitUntilCondition(^bool() {
-      return !IsToolbarLoaded(window_.get());
+      return !IsToolbarLoaded(window_);
     });
     [toolbar_ browserStateDestroyed];
     PerfTest::TearDown();
   }
 
   // Returns whether Omnibox has been loaded.
   bool IsToolbarLoaded(UIView* topView) {
     return FindViewByClass(topView, [OmniboxTextFieldIOS class]) != nil;
   }
 
@@ skipping 13 matching lines @@
         base::TimeDelta::FromSecondsD(kSpinDelaySeconds));
     return elapsed;
   }
 
   // Creates a dummy text field and make it be a first responder so keyboard
   // comes up. In general, there's a lot of time spent in loading up various
   // graphics assets on a keyboard which may distort the measurement of Chrome
   // Omnibox focus timings. Call this function to preload keyboard before
   // doing the real test.
   base::TimeDelta PreLoadKeyboard() {
-    base::scoped_nsobject<UITextField> textField(
-        [[UITextField alloc] initWithFrame:CGRectMake(20, 100, 280, 29)]);
+    UITextField* textField =
+        [[UITextField alloc] initWithFrame:CGRectMake(20, 100, 280, 29)];
     [textField setBorderStyle:UITextBorderStyleRoundedRect];
     [window_ addSubview:textField];
     base::TimeDelta elapsed = base::test::ios::TimeUntilCondition(
         ^{
           [textField becomeFirstResponder];
         },
         ^bool() {
           return [keyboard_listener_ isKeyboardVisible];
         },
         false, base::TimeDelta());
@@ skipping 35 matching lines @@
           return ![keyboard_listener_ isKeyboardVisible];
         },
         false, base::TimeDelta());
   }
 
   std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
   FakeWebStateListDelegate web_state_list_delegate_;
   std::unique_ptr<WebStateList> web_state_list_;
   std::unique_ptr<ToolbarModelDelegateIOS> toolbar_model_delegate_;
   std::unique_ptr<ToolbarModelIOS> toolbar_model_ios_;
-  base::scoped_nsobject<WebToolbarController> toolbar_;
-  base::scoped_nsobject<UIWindow> window_;
-  base::scoped_nsobject<KeyboardAppearanceListener> keyboard_listener_;
+  WebToolbarController* toolbar_;
+  UIWindow* window_;
+  KeyboardAppearanceListener* keyboard_listener_;
 };
 
 // Measures the amount of time it takes the Omnibox text field to activate
 // the on-screen keyboard.
 TEST_F(OmniboxPerfTest, TestTextFieldDidBeginEditing) {
   LogPerfTiming("Keyboard preload", PreLoadKeyboard());
   OmniboxTextFieldIOS* textField = (OmniboxTextFieldIOS*)FindViewByClass(
       [toolbar_ view], [OmniboxTextFieldIOS class]);
 
   // Time how long it takes to "focus" on omnibox.
@@ skipping 45 matching lines @@
         }
         NSLog(@"%2d: %@", index, logMessage);
         return elapsed;
       },
       ^() {
         [textField setText:@""];
         DisableKeyboard(textField);
       });
 }
 }