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

extensions/renderer/activity_log_converter_strategy.h

Index: extensions/renderer/activity_log_converter_strategy.h
diff --git a/extensions/renderer/activity_log_converter_strategy.h b/extensions/renderer/activity_log_converter_strategy.h
index fd7a1d2babf87cf2f0355f8ff34d1123c022aa18..b699d213c104be3ae2695a07a28112427bdb7ddc 100644
--- a/extensions/renderer/activity_log_converter_strategy.h
+++ b/extensions/renderer/activity_log_converter_strategy.h
@@ -28,17 +28,17 @@ class ActivityLogConverterStrategy
 
   // content::V8ValueConverter::Strategy implementation.
   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 FromV8Array(v8::Local<v8::Array> value,
-                   base::Value** out,
+                   std::unique_ptr<base::Value>* out,
                    v8::Isolate* isolate,
                    const FromV8ValueCallback& callback) const override;
 
  private:
   bool FromV8Internal(v8::Local<v8::Object> value,
-                      base::Value** out,
+                      std::unique_ptr<base::Value>* out,
                       v8::Isolate* isolate,
                       const FromV8ValueCallback& callback) const;