Backporting JSONValues from protocol::Values

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 15ae442e9a9fb3ac1d7ab4b34e0fade56b777386..8e1c56094984b3ed6e25d921ce18559e32be4fe8 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -3045,21 +3045,21 @@ void FrameView::trackObjectPaintInvalidation(const DisplayItemClient& client, Pa
     m_trackedObjectPaintInvalidations->append(invalidation);
 }
 
-PassRefPtr<JSONArray> FrameView::trackedObjectPaintInvalidationsAsJSON() const
+std::unique_ptr<JSONArray> FrameView::trackedObjectPaintInvalidationsAsJSON() const
 {
     if (!m_trackedObjectPaintInvalidations)
         return nullptr;
 
-    RefPtr<JSONArray> result = JSONArray::create();
+    std::unique_ptr<JSONArray> result = JSONArray::create();
     for (Frame* frame = m_frame->tree().top(); frame; frame = frame->tree().traverseNext()) {
         if (!frame->isLocalFrame())
             continue;
         if (LayoutViewItem layoutView = toLocalFrame(frame)->contentLayoutItem()) {
             for (const auto& item : *layoutView.frameView()->m_trackedObjectPaintInvalidations) {
-                RefPtr<JSONObject> itemJSON = JSONObject::create();
+                std::unique_ptr<JSONObject> itemJSON = JSONObject::create();
                 itemJSON->setString("object", item.name);
                 itemJSON->setString("reason", paintInvalidationReasonToString(item.reason));
-                result->pushObject(itemJSON);
+                result->pushObject(std::move(itemJSON));
             }
         }
     }