Remove the Vector::append overload that takes a Vector

Source/core/rendering/RenderTableSection.cpp

Index: Source/core/rendering/RenderTableSection.cpp
diff --git a/Source/core/rendering/RenderTableSection.cpp b/Source/core/rendering/RenderTableSection.cpp
index c88b4903b3b26c7625bcc11c8afce4d37a4dc275..c0ae2ee6387f2e92c3b28f98eaf7ed01ef573d28 100644
--- a/Source/core/rendering/RenderTableSection.cpp
+++ b/Source/core/rendering/RenderTableSection.cpp
@@ -1582,7 +1582,7 @@ void RenderTableSection::splitColumn(unsigned pos, unsigned first)
         Row& r = m_grid[row].row;
         r.insert(pos + 1, CellStruct());
         if (r[pos].hasCells()) {
-            r[pos + 1].cells.append(r[pos].cells);
+            r[pos + 1].cells.appendVector(r[pos].cells);
             RenderTableCell* cell = r[pos].primaryCell();
             ASSERT(cell);
             ASSERT(cell->colSpan() >= (r[pos].inColSpan ? 1u : 0));