Migrate WTF::Vector::append() to ::push_back() [part 6 of N]

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 0b114e99a7b12e053dbe6e313265dce873988f92..88bfd295adafbfa2a186dd6f3f0695d5961b2976 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -3128,7 +3128,7 @@ void FrameView::updateStyleAndLayoutIfNeededRecursiveInternal() {
     if (!child->isLocalFrame())
       continue;
     if (FrameView* view = toLocalFrame(child)->view())
-      frameViews.append(view);
+      frameViews.push_back(view);
   }
 
   for (const auto& frameView : frameViews)
@@ -3470,7 +3470,7 @@ void FrameView::trackObjectPaintInvalidation(const DisplayItemClient& client,
     return;
 
   ObjectPaintInvalidation invalidation = {client.debugName(), reason};
-  m_trackedObjectPaintInvalidations->append(invalidation);
+  m_trackedObjectPaintInvalidations->push_back(invalidation);
 }
 
 std::unique_ptr<JSONArray> FrameView::trackedObjectPaintInvalidationsAsJSON()