Revert of [ObjC ARC] Converts ios/web:web to ARC.

ios/web/webui/web_ui_mojo_inttest.mm

 // Copyright 2016 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.
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #import "ios/testing/wait_util.h"
@@ skipping 119 matching lines @@
  private:
   // UI handler class which communicates with test WebUI page.
   TestUIHandler* ui_handler_;
 };
 }  // namespace
 
 // A test fixture for verifying mojo comminication for WebUI.
 class WebUIMojoTest : public WebIntTest {
  protected:
   void SetUp() override {
-    @autoreleasepool {
-      WebIntTest::SetUp();
-      ui_handler_ = base::MakeUnique<TestUIHandler>();
-      web::WebState::CreateParams params(GetBrowserState());
-      web_state_ = base::MakeUnique<web::WebStateImpl>(params);
-      web_state_->GetNavigationManagerImpl().InitializeSession();
-      WebUIIOSControllerFactory::RegisterFactory(
-          new TestWebUIControllerFactory(ui_handler_.get()));
-    }
-  }
-
-  void TearDown() override {
-    @autoreleasepool {
-      web_state_.reset();
-      WebIntTest::TearDown();
-    }
+    WebIntTest::SetUp();
+    ui_handler_ = base::MakeUnique<TestUIHandler>();
+    web::WebState::CreateParams params(GetBrowserState());
+    web_state_ = base::MakeUnique<web::WebStateImpl>(params);
+    web_state_->GetNavigationManagerImpl().InitializeSession();
+    WebUIIOSControllerFactory::RegisterFactory(
+        new TestWebUIControllerFactory(ui_handler_.get()));
   }
 
   // Returns WebState which loads test WebUI page.
   WebStateImpl* web_state() { return web_state_.get(); }
   // Returns UI handler which communicates with WebUI page.
   TestUIHandler* test_ui_handler() { return ui_handler_.get(); }
 
  private:
   std::unique_ptr<WebStateImpl> web_state_;
   std::unique_ptr<TestUIHandler> ui_handler_;
 };
 
 // Tests that JS can send messages to the native code and vice versa.
 // TestUIHandler is used for communication and test suceeds only when
 // |TestUIHandler| sucessfully receives "ack" message from WebUI page.
 #if TARGET_IPHONE_SIMULATOR
 #define MAYBE_MessageExchange MessageExchange
 #else
 #define MAYBE_MessageExchange FLAKY_MessageExchange
 #endif
 // TODO(crbug.com/720098): Enable this test on device.
 TEST_F(WebUIMojoTest, MAYBE_MessageExchange) {
-  @autoreleasepool {
-    web_state()->SetWebUsageEnabled(true);
-    web_state()->GetView();  // WebState won't load URL without view.
-    GURL url(url::SchemeHostPort(kTestWebUIScheme, kTestWebUIURLHost, 0)
-                 .Serialize());
-    NavigationManager::WebLoadParams load_params(url);
-    web_state()->GetNavigationManager()->LoadURLWithParams(load_params);
+  web_state()->SetWebUsageEnabled(true);
+  web_state()->GetView();  // WebState won't load URL without view.
+  GURL url(
+      url::SchemeHostPort(kTestWebUIScheme, kTestWebUIURLHost, 0).Serialize());
+  NavigationManager::WebLoadParams load_params(url);
+  web_state()->GetNavigationManager()->LoadURLWithParams(load_params);
 
-    // Wait until |TestUIHandler| receives "fin" message from WebUI page.
-    bool fin_received = testing::WaitUntilConditionOrTimeout(kMessageTimeout, ^{
-      // Flush any pending tasks. Don't RunUntilIdle() because
-      // RunUntilIdle() is incompatible with mojo::SimpleWatcher's
-      // automatic arming behavior, which Mojo JS still depends upon.
-      //
-      // TODO(crbug.com/701875): Introduce the full watcher API to JS and get
-      // rid of this hack.
-      base::RunLoop loop;
-      base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
-                                                    loop.QuitClosure());
-      loop.Run();
-      return test_ui_handler()->IsFinReceived();
-    });
+  // Wait until |TestUIHandler| receives "fin" message from WebUI page.
+  bool fin_received = testing::WaitUntilConditionOrTimeout(kMessageTimeout, ^{
+    // Flush any pending tasks. Don't RunUntilIdle() because
+    // RunUntilIdle() is incompatible with mojo::SimpleWatcher's
+    // automatic arming behavior, which Mojo JS still depends upon.
+    //
+    // TODO(crbug.com/701875): Introduce the full watcher API to JS and get rid
+    // of this hack.
+    base::RunLoop loop;
+    base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
+                                                  loop.QuitClosure());
+    loop.Run();
+    return test_ui_handler()->IsFinReceived();
+  });
 
-    ASSERT_TRUE(fin_received);
-    EXPECT_FALSE(web_state()->IsLoading());
-    EXPECT_EQ(url, web_state()->GetLastCommittedURL());
-  }
+  ASSERT_TRUE(fin_received);
+  EXPECT_FALSE(web_state()->IsLoading());
+  EXPECT_EQ(url, web_state()->GetLastCommittedURL());
 }
 
 }  // namespace web