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

ios/web/net/web_http_protocol_handler_delegate_unittest.mm

Index: ios/web/net/web_http_protocol_handler_delegate_unittest.mm
diff --git a/ios/web/net/web_http_protocol_handler_delegate_unittest.mm b/ios/web/net/web_http_protocol_handler_delegate_unittest.mm
index 2e353fc1c73d666e64563233ddcfd2525c2321be..bb53e6986e1fc23c5b8b2061278998c5d17f366d 100644
--- a/ios/web/net/web_http_protocol_handler_delegate_unittest.mm
+++ b/ios/web/net/web_http_protocol_handler_delegate_unittest.mm
@@ -6,9 +6,11 @@
 
 #import <Foundation/Foundation.h>
 
+#include <memory>
+
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/thread_task_runner_handle.h"
 #include "ios/web/public/test/scoped_testing_web_client.h"
@@ -51,12 +53,12 @@ class WebHTTPProtocolHandlerDelegateTest : public testing::Test {
       : context_getter_(new net::TestURLRequestContextGetter(
             base::ThreadTaskRunnerHandle::Get())),
         delegate_(new WebHTTPProtocolHandlerDelegate(context_getter_.get())),
-        web_client_(make_scoped_ptr(new AppSpecificURLTestWebClient)) {}
+        web_client_(base::WrapUnique(new AppSpecificURLTestWebClient)) {}
 
  protected:
   base::MessageLoop message_loop_;
   scoped_refptr<net::URLRequestContextGetter> context_getter_;
-  scoped_ptr<WebHTTPProtocolHandlerDelegate> delegate_;
+  std::unique_ptr<WebHTTPProtocolHandlerDelegate> delegate_;
   web::ScopedTestingWebClient web_client_;
 };