Use std::unique_ptr<base::Value> in V8ValueConverter.

content/renderer/java/gin_java_bridge_value_converter.h

 // 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.
 
 #ifndef CONTENT_RENDERER_JAVA_GIN_JAVA_BRIDGE_VALUE_CONVERTER_H_
 #define CONTENT_RENDERER_JAVA_GIN_JAVA_BRIDGE_VALUE_CONVERTER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/public/child/v8_value_converter.h"
 
 namespace content {
 
 class GinJavaBridgeValueConverter : public content::V8ValueConverter::Strategy {
  public:
   CONTENT_EXPORT GinJavaBridgeValueConverter();
   CONTENT_EXPORT ~GinJavaBridgeValueConverter() override;
 
   CONTENT_EXPORT v8::Local<v8::Value> ToV8Value(
       const base::Value* value,
       v8::Local<v8::Context> context) const;
   CONTENT_EXPORT std::unique_ptr<base::Value> FromV8Value(
       v8::Local<v8::Value> value,
       v8::Local<v8::Context> context) const;
 
   // content::V8ValueConverter::Strategy
   bool FromV8Object(v8::Local<v8::Object> value,
-                    base::Value** out,
+                    std::unique_ptr<base::Value>* out,
                     v8::Isolate* isolate,
                     const FromV8ValueCallback& callback) const override;
   bool FromV8ArrayBuffer(v8::Local<v8::Object> value,
-                         base::Value** out,
+                         std::unique_ptr<base::Value>* out,
                          v8::Isolate* isolate) const override;
   bool FromV8Number(v8::Local<v8::Number> value,
-                    base::Value** out) const override;
-  bool FromV8Undefined(base::Value** out) const override;
+                    std::unique_ptr<base::Value>* out) const override;
+  bool FromV8Undefined(std::unique_ptr<base::Value>* out) const override;
 
  private:
   std::unique_ptr<V8ValueConverter> converter_;
 
   DISALLOW_COPY_AND_ASSIGN(GinJavaBridgeValueConverter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_JAVA_GIN_JAVA_BRIDGE_VALUE_CONVERTER_H_