Fix table cell background caching issue about interest rect

Source/core/paint/TableCellPainterTest.cpp

Index: Source/core/paint/TableCellPainterTest.cpp
diff --git a/Source/core/paint/TableCellPainterTest.cpp b/Source/core/paint/TableCellPainterTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..769766c321c73a971f51d9befe8da9ea4d375936
--- /dev/null
+++ b/Source/core/paint/TableCellPainterTest.cpp
@@ -0,0 +1,52 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#include "core/paint/DeprecatedPaintLayerPainter.h"
+#include "core/paint/DisplayItemListPaintTest.h"
+#include "platform/graphics/GraphicsContext.h"
+
+namespace blink {
+
+using TableCellPainterTest = DisplayItemListPaintTest;
+
+// TODO(wangxianzhu): Create a version for slimming paint v2 when it supports interest rect
+TEST_F(TableCellPainterTest, TableCellBackgroundInterestRect)
+{
+    setBodyInnerHTML(
+        "<style>"
+        "  td { width: 200px; height: 200px; border: none; }"
+        "  tr { background-color: blue; }"
+        "  table { border: none; border-spacing: 0; border-collapse: collapse; }"
+        "</style>"
+        "<table>"
+        "  <tr><td id='cell1'></td></tr>"
+        "  <tr><td id='cell2'></td></tr>"
+        "</table>");
+
+    LayoutView& layoutView = *document().layoutView();
+    DeprecatedPaintLayer& rootLayer = *layoutView.layer();
+    LayoutObject& cell1 = *document().getElementById("cell1")->layoutObject();
+    LayoutObject& cell2 = *document().getElementById("cell2")->layoutObject();
+
+    GraphicsContext context(&rootDisplayItemList());
+    DeprecatedPaintLayerPaintingInfo paintingInfo(&rootLayer, LayoutRect(0, 0, 200, 200), GlobalPaintNormalPhase, LayoutSize());
+    DeprecatedPaintLayerPainter(rootLayer).paintLayerContents(&context, paintingInfo, PaintLayerPaintingCompositingAllPhases);
+    rootDisplayItemList().commitNewDisplayItems();
+
+    EXPECT_DISPLAY_LIST_BASE(rootDisplayItemList().displayItems(), 2,
+        TestDisplayItem(layoutView, DisplayItem::BoxDecorationBackground),
+        TestDisplayItem(cell1, DisplayItem::TableCellBackgroundFromContainers));
+
+    DeprecatedPaintLayerPaintingInfo paintingInfo1(&rootLayer, LayoutRect(0, 300, 200, 200), GlobalPaintNormalPhase, LayoutSize());
+    DeprecatedPaintLayerPainter(rootLayer).paintLayerContents(&context, paintingInfo1, PaintLayerPaintingCompositingAllPhases);
+    rootDisplayItemList().commitNewDisplayItems();
+
+    EXPECT_DISPLAY_LIST_BASE(rootDisplayItemList().displayItems(), 2,
+        TestDisplayItem(layoutView, DisplayItem::BoxDecorationBackground),
+        TestDisplayItem(cell2, DisplayItem::TableCellBackgroundFromContainers));
+}
+
+} // namespace blink