Remove base::Value::CreateNullValue

components/dom_distiller/ios/distiller_page_ios.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.
 
 #include "components/dom_distiller/ios/distiller_page_ios.h"
 
 #import <UIKit/UIKit.h>
 
 #include <utility>
 
@@ skipping 48 matching lines @@
       DCHECK(result->IsType(base::Value::Type::DOUBLE));
     } else {
       result.reset(new base::Value([wk_result intValue]));
       DCHECK(result->IsType(base::Value::Type::INTEGER));
     }
     // End of different implementation.
   } else if (result_type == CFBooleanGetTypeID()) {
     result.reset(new base::Value(static_cast<bool>([wk_result boolValue])));
     DCHECK(result->IsType(base::Value::Type::BOOLEAN));
   } else if (result_type == CFNullGetTypeID()) {
-    result = base::Value::CreateNullValue();
+    result = base::MakeUnique<base::Value>();
     DCHECK(result->IsType(base::Value::Type::NONE));
   } else if (result_type == CFDictionaryGetTypeID()) {
     std::unique_ptr<base::DictionaryValue> dictionary =
         base::MakeUnique<base::DictionaryValue>();
     for (id key in wk_result) {
       NSString* obj_c_string = base::mac::ObjCCast<NSString>(key);
       const std::string path = base::SysNSStringToUTF8(obj_c_string);
       std::unique_ptr<base::Value> value =
           ValueResultFromScriptResult(wk_result[obj_c_string], max_depth - 1);
       if (value) {
@@ skipping 145 matching lines @@
       instanceOfClass:[CRWJSInjectionManager class]]
       executeJavaScript:base::SysUTF8ToNSString(script_)
       completionHandler:^(id result, NSError* error) {
         DistillerPageIOS* distiller_page = weak_this.get();
         if (distiller_page)
           distiller_page->HandleJavaScriptResult(result);
       }];
 }
 
 void DistillerPageIOS::HandleJavaScriptResult(id result) {
-  std::unique_ptr<base::Value> resultValue = base::Value::CreateNullValue();
+  auto resultValue = base::MakeUnique<base::Value>();
   if (result) {
     resultValue = ValueResultFromScriptResult(result);
   }
   OnDistillationDone(url_, resultValue.get());
 }
 
 std::unique_ptr<base::Value> DistillerPageIOS::ValueResultFromScriptResult(
     id wk_result) {
   return ::ValueResultFromScriptResult(wk_result,
                                        kMaximumParsingRecursionDepth);
 }
 }  // namespace dom_distiller