Migrate WTF::Vector::append() to ::push_back() [part 12 of N]

third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
index 8f2680f107e4dab4ee25d3d674aeccc9975af315..081d5ed6083e51b6a73e71b4bddbfcc3ddbf2afd 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
@@ -2054,7 +2054,7 @@ void PaintLayerScrollableArea::PreventRelayoutScope::setBoxNeedsLayout(
   if (!s_needsRelayout)
     s_needsRelayout =
         new PersistentHeapVector<Member<PaintLayerScrollableArea>>();
-  s_needsRelayout->append(&scrollableArea);
+  s_needsRelayout->push_back(&scrollableArea);
 }
 
 void PaintLayerScrollableArea::PreventRelayoutScope::resetRelayoutNeeded() {
@@ -2088,7 +2088,7 @@ void PaintLayerScrollableArea::DelayScrollOffsetClampScope::setNeedsClamp(
     PaintLayerScrollableArea* scrollableArea) {
   if (!scrollableArea->needsScrollOffsetClamp()) {
     scrollableArea->setNeedsScrollOffsetClamp(true);
-    s_needsClamp->append(scrollableArea);
+    s_needsClamp->push_back(scrollableArea);
   }
 }