[ObjC ARC] Converts ios/web:ios_web_navigation_unittests to ARC.

ios/web/navigation/navigation_manager_impl_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 "ios/web/navigation/navigation_manager_impl.h"
 
 #include "base/logging.h"
 #include "base/mac/bind_objc_block.h"
-#import "base/mac/scoped_nsobject.h"
 #import "ios/web/navigation/crw_session_controller+private_constructors.h"
 #import "ios/web/navigation/navigation_manager_delegate.h"
 #include "ios/web/public/navigation_item.h"
 #include "ios/web/public/test/fakes/test_browser_state.h"
 #include "ios/web/test/test_url_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 #include "url/scheme_host_port.h"
 #include "url/url_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace web {
 namespace {
 
 // URL scheme that will be rewritten by UrlRewriter installed in
 // NavigationManagerTest fixture. Scheme will be changed to kTestWebUIScheme.
 const char kSchemeToRewrite[] = "navigationmanagerschemetorewrite";
 
 // Replaces |kSchemeToRewrite| scheme with |kTestWebUIScheme|.
 bool UrlRewriter(GURL* url, BrowserState* browser_state) {
   if (url->scheme() == kSchemeToRewrite) {
@@ skipping 26 matching lines @@
 // Test fixture for NavigationManagerImpl testing.
 class NavigationManagerTest : public PlatformTest {
  protected:
   NavigationManagerTest() : manager_(new NavigationManagerImpl()) {
     // Setup rewriter.
     BrowserURLRewriter::GetInstance()->AddURLRewriter(UrlRewriter);
     url::AddStandardScheme(kSchemeToRewrite, url::SCHEME_WITHOUT_PORT);
 
     manager_->SetDelegate(&delegate_);
     manager_->SetBrowserState(&browser_state_);
-    controller_.reset(
-        [[CRWSessionController alloc] initWithBrowserState:&browser_state_]);
-    manager_->SetSessionController(controller_.get());
+    controller_ =
+        [[CRWSessionController alloc] initWithBrowserState:&browser_state_];
+    manager_->SetSessionController(controller_);
   }
-  CRWSessionController* session_controller() { return controller_.get(); }
+  CRWSessionController* session_controller() { return controller_; }
   NavigationManagerImpl* navigation_manager() { return manager_.get(); }
   TestNavigationManagerDelegate navigation_manager_delegate() {
     return delegate_;
   }
 
  private:
   TestBrowserState browser_state_;
   TestNavigationManagerDelegate delegate_;
   std::unique_ptr<NavigationManagerImpl> manager_;
-  base::scoped_nsobject<CRWSessionController> controller_;
+  CRWSessionController* controller_;
 };
 
 // Tests state of an empty navigation manager.
 TEST_F(NavigationManagerTest, EmptyManager) {
   EXPECT_EQ(0, navigation_manager()->GetItemCount());
   EXPECT_EQ(-1, navigation_manager()->GetLastCommittedItemIndex());
   EXPECT_EQ(-1, navigation_manager()->GetLastCommittedItemIndex());
   EXPECT_FALSE(navigation_manager()->GetPendingItem());
   EXPECT_EQ(-1, navigation_manager()->GetPendingItemIndex());
   EXPECT_EQ(-1, navigation_manager()->GetIndexForOffset(0));
@@ skipping 1290 matching lines @@
   // Create an item that does not exist in the NavigationManagerImpl.
   std::unique_ptr<web::NavigationItem> item_not_found =
       web::NavigationItem::Create();
   // Verify GetIndexOfItem() results.
   EXPECT_EQ(0, navigation_manager()->GetIndexOfItem(item0));
   EXPECT_EQ(1, navigation_manager()->GetIndexOfItem(item1));
   EXPECT_EQ(-1, navigation_manager()->GetIndexOfItem(item_not_found.get()));
 }
 
 }  // namespace web