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

ios/web/public/test/http_server_inttest.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/public/test/http_server.h"
+#import <Foundation/Foundation.h>
 
-#import <Foundation/Foundation.h>
+#include <memory>
 #include <string>
 
 #import "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/sys_string_conversions.h"
 #import "base/test/ios/wait_util.h"
+#import "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/response_providers/string_response_provider.h"
 #import "ios/web/test/web_int_test.h"
 #import "net/base/mac/url_conversions.h"
 #include "net/http/http_response_headers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 
 // A test fixture for verifying the behavior of web::test::HttpServer.
 typedef web::WebIntTest HttpServerTest;
 
 // Tests that a web::test::HttpServer can be started and can send and receive
 // requests and response from |TestResponseProvider|.
 TEST_F(HttpServerTest, StartAndInterfaceWithResponseProvider) {
   const std::string kHelloWorld = "Hello World";
-  scoped_ptr<web::StringResponseProvider> provider(
+  std::unique_ptr<web::StringResponseProvider> provider(
       new web::StringResponseProvider(kHelloWorld));
 
   web::test::HttpServer& server = web::test::HttpServer::GetSharedInstance();
   ASSERT_TRUE(server.IsRunning());
   server.AddResponseProvider(provider.release());
 
   __block base::scoped_nsobject<NSString> page_result;
   id completion_handler =
       ^(NSData* data, NSURLResponse* response, NSError* error) {
           page_result.reset([[NSString alloc]
               initWithData:data encoding:NSUTF8StringEncoding]);
       };
   NSURL* url = net::NSURLWithGURL(server.MakeUrl("http://whatever"));
   NSURLSessionDataTask* data_task =
       [[NSURLSession sharedSession] dataTaskWithURL:url
                                   completionHandler:completion_handler];
   [data_task resume];
   base::test::ios::WaitUntilCondition(^bool() {
     return page_result;
   });
   EXPECT_NSEQ(page_result, base::SysUTF8ToNSString(kHelloWorld));
 }