Migrate WTF::Vector::append() to ::push_back() [part 14 of N]

third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp

Index: third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
diff --git a/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp b/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
index b5159fe10a207e15ba3dc574abdd445d12c623ef..e2d169998709b0b5e22d7f14f8651a6d8344a095 100644
--- a/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
+++ b/third_party/WebKit/Source/platform/testing/TestPaintArtifact.cpp
@@ -65,7 +65,7 @@ TestPaintArtifact& TestPaintArtifact::chunk(
   PaintChunk chunk;
   chunk.beginIndex = m_displayItemList.size();
   chunk.properties = properties;
-  m_paintChunks.append(chunk);
+  m_paintChunks.push_back(chunk);
   return *this;
 }
 
@@ -75,7 +75,7 @@ TestPaintArtifact& TestPaintArtifact::rectDrawing(const FloatRect& bounds,
       WTF::makeUnique<DummyRectClient>(bounds, color);
   m_displayItemList.allocateAndConstruct<DrawingDisplayItem>(
       *client, DisplayItem::kDrawingFirst, client->makePicture());
-  m_dummyClients.append(std::move(client));
+  m_dummyClients.push_back(std::move(client));
   return *this;
 }
 
@@ -89,7 +89,7 @@ TestPaintArtifact& TestPaintArtifact::foreignLayer(
   m_displayItemList.allocateAndConstruct<ForeignLayerDisplayItem>(
       *client, DisplayItem::kForeignLayerFirst, std::move(layer), location,
       size);
-  m_dummyClients.append(std::move(client));
+  m_dummyClients.push_back(std::move(client));
   return *this;
 }