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

ios/web/web_state/ui/crw_web_controller_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 "ios/web/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #include <utility>
 
@@ skipping 133 matching lines @@
                                                  requestURL:
                                           completionHandler:)) {
     return YES;
   }
   return [super respondsToSelector:selector];
 }
 @end
 
 @implementation MockInteractionLoader {
   // Backs up the property with the same name.
-  scoped_ptr<web::BlockedPopupInfo> _blockedPopupInfo;
+  std::unique_ptr<web::BlockedPopupInfo> _blockedPopupInfo;
 }
 @synthesize popupURL = _popupURL;
 @synthesize sourceURL = _sourceURL;
 @synthesize blockPopups = _blockPopups;
 @synthesize childWebController = _childWebController;
 @synthesize SSLInfo = _SSLInfo;
 @synthesize SSLStatus = _SSLStatus;
 @synthesize recoverable = _recoverable;
 @synthesize shouldContinueCallback = _shouldContinueCallback;
 
@@ skipping 824 matching lines @@
 
   [webController_ setDelegate:delegate];
   web::SimulateWKWebViewCrash(webView_);
 
   EXPECT_OCMOCK_VERIFY(delegate);
   EXPECT_FALSE([webController_ isViewAlive]);
   [webController_ setDelegate:nil];
 };
 
 }  // namespace