[Content] Update V8ValueConverter::create to return a std::unique_ptr

chrome/renderer/extensions/notifications_native_handler.cc

Index: chrome/renderer/extensions/notifications_native_handler.cc
diff --git a/chrome/renderer/extensions/notifications_native_handler.cc b/chrome/renderer/extensions/notifications_native_handler.cc
index b45b540c0fc21b577cef2922bc891e10e4321765..58d8ee8b6d3846ddf5ae1ce46e1afdfcf7ab610e 100644
--- a/chrome/renderer/extensions/notifications_native_handler.cc
+++ b/chrome/renderer/extensions/notifications_native_handler.cc
@@ -31,6 +31,7 @@ void NotificationsNativeHandler::GetNotificationImageSizes(
   float scale_factor =
       ui::GetScaleForScaleFactor(ui::GetSupportedScaleFactors().back());
 
+  // TODO(devlin): Prefer gin::DataObjectBuilder here.

[Devlin, 2017/06/12 20:22:16]

(If https://codereview.chromium.org/2937543002/ lands first, I'll update this)

   std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
   dict->SetDouble("scaleFactor", scale_factor);
   dict->SetInteger("icon.width", bitmap_sizes.icon_size.width());
@@ -44,10 +45,8 @@ void NotificationsNativeHandler::GetNotificationImageSizes(
   dict->SetInteger("appIconMask.height",
                    bitmap_sizes.app_icon_mask_size.height());
 
-  std::unique_ptr<content::V8ValueConverter> converter(
-      content::V8ValueConverter::create());
-  args.GetReturnValue().Set(
-      converter->ToV8Value(dict.get(), context()->v8_context()));
+  args.GetReturnValue().Set(content::V8ValueConverter::Create()->ToV8Value(
+      dict.get(), context()->v8_context()));
 }
 
 }  // namespace extensions