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

content/renderer/java/gin_java_bridge_value_converter.h

Index: content/renderer/java/gin_java_bridge_value_converter.h
diff --git a/content/renderer/java/gin_java_bridge_value_converter.h b/content/renderer/java/gin_java_bridge_value_converter.h
index 2e48f199db366da89a0fea6a2f05194710b6d978..9ab3849a3f513e2530c1d09286060c029ad3542c 100644
--- a/content/renderer/java/gin_java_bridge_value_converter.h
+++ b/content/renderer/java/gin_java_bridge_value_converter.h
@@ -27,15 +27,15 @@ class GinJavaBridgeValueConverter : public content::V8ValueConverter::Strategy {
 
   // 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_;