Combine and simplify LayoutTableSection::DirtiedRows() and DirtiedEffectiveColumns()

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

Index: third_party/WebKit/Source/core/paint/TablePainterTest.cpp
diff --git a/third_party/WebKit/Source/core/paint/TablePainterTest.cpp b/third_party/WebKit/Source/core/paint/TablePainterTest.cpp
index 1404f183b58feb1311d7fc4ffe7e83cc5c44bf4b..3db5f495e4e485bde1ff923ce0b0cc2112e6fb22 100644
--- a/third_party/WebKit/Source/core/paint/TablePainterTest.cpp
+++ b/third_party/WebKit/Source/core/paint/TablePainterTest.cpp
@@ -16,9 +16,9 @@ using TablePainterTest = PaintControllerPaintTest;
 TEST_F(TablePainterTest, Background) {
   SetBodyInnerHTML(
       "<style>"
-      "  td { width: 200px; height: 200px; border: none; }"
+      "  td { width: 200px; height: 200px; padding: 0; border: none; }"
       "  tr { background-color: blue; }"
-      "  table { border: none; border-spacing: 0; border-collapse: collapse; }"
+      "  table { border: none; border-spacing: 0 }"
       "</style>"
       "<table>"
       "  <tr id='row1'><td></td></tr>"