Convert //ios from scoped_ptr to std::unique_ptr.

ios/web/test/web_test.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/web/test/web_test.h"
 
 #include <utility>
 
 #include "base/base64.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #import "base/test/ios/wait_util.h"
 #import "ios/testing/ocmock_complex_type_helper.h"
 #import "ios/web/navigation/crw_session_controller.h"
 #import "ios/web/net/crw_url_verifying_protocol_handler.h"
 #include "ios/web/public/active_state_manager.h"
 #include "ios/web/public/referrer.h"
 #import "ios/web/public/web_state/ui/crw_web_delegate.h"
 #import "ios/web/web_state/ui/crw_wk_web_view_web_controller.h"
 #import "ios/web/web_state/web_state_impl.h"
@@ skipping 10 matching lines @@
       mainDocumentURL:(const GURL&)mainDocumentURL
           linkClicked:(BOOL)linkClicked {
   return YES;
 }
 @end
 
 namespace web {
 
 #pragma mark -
 
-WebTest::WebTest() : web_client_(make_scoped_ptr(new TestWebClient)) {}
+WebTest::WebTest() : web_client_(base::WrapUnique(new TestWebClient)) {}
 WebTest::~WebTest() {}
 
 void WebTest::SetUp() {
   PlatformTest::SetUp();
   BrowserState::GetActiveStateManager(&browser_state_)->SetActive(true);
 }
 
 void WebTest::TearDown() {
   BrowserState::GetActiveStateManager(&browser_state_)->SetActive(false);
   PlatformTest::TearDown();
@@ skipping 166 matching lines @@
       JSONObjectWithData:evaluationData
                  options:0
                    error:&error];
   DCHECK(dictionary && !error);
   NSString* exception = [dictionary objectForKey:@"exception"];
   CHECK(!exception) << "Script error: " << [exception UTF8String];
   return [dictionary objectForKey:@"result"];
 }
 
 CRWWebController* WebTestWithWebController::CreateWebController() {
-  scoped_ptr<WebStateImpl> web_state_impl(new WebStateImpl(GetBrowserState()));
+  std::unique_ptr<WebStateImpl> web_state_impl(
+      new WebStateImpl(GetBrowserState()));
   return [[CRWWKWebViewWebController alloc]
       initWithWebState:std::move(web_state_impl)];
 }
 
 void WebTestWithWebController::WillProcessTask(
     const base::PendingTask& pending_task) {
   // Nothing to do.
 }
 
 void WebTestWithWebController::DidProcessTask(
@@ skipping 13 matching lines @@
   }
   return false;
 }
 
 NSString* WebTestWithWebController::CreateLoadCheck() {
   return [NSString stringWithFormat:@"<p style=\"display: none;\">%d</p>",
                                     s_html_load_count++];
 }
 
 }  // namespace web