Implement 'grid-template' parsing

Source/core/rendering/style/RenderStyle.h

Index: Source/core/rendering/style/RenderStyle.h
diff --git a/Source/core/rendering/style/RenderStyle.h b/Source/core/rendering/style/RenderStyle.h
index 286ea4911c1217a528cc3787b5b4bc48855933f4..c0ed8fdd993c633f85d0ce647d8af141b6c003e8 100644
--- a/Source/core/rendering/style/RenderStyle.h
+++ b/Source/core/rendering/style/RenderStyle.h
@@ -737,6 +737,9 @@ public:
     const Vector<GridTrackSize>& gridDefinitionRows() const { return rareNonInheritedData->m_grid->m_gridDefinitionRows; }
     const NamedGridLinesMap& namedGridColumnLines() const { return rareNonInheritedData->m_grid->m_namedGridColumnLines; }
     const NamedGridLinesMap& namedGridRowLines() const { return rareNonInheritedData->m_grid->m_namedGridRowLines; }
+    const NamedGridAreaMap& namedGridArea() const { return rareNonInheritedData->m_grid->m_namedGridArea; }
+    size_t namedGridAreaRowCount() const { return rareNonInheritedData->m_grid->m_namedGridAreaRowCount; }
+    size_t namedGridAreaColumnCount() const { return rareNonInheritedData->m_grid->m_namedGridAreaColumnCount; }
     GridAutoFlow gridAutoFlow() const { return rareNonInheritedData->m_grid->m_gridAutoFlow; }
     const GridTrackSize& gridAutoColumns() const { return rareNonInheritedData->m_grid->m_gridAutoColumns; }
     const GridTrackSize& gridAutoRows() const { return rareNonInheritedData->m_grid->m_gridAutoRows; }
@@ -1187,6 +1190,9 @@ public:
     void setGridDefinitionRows(const Vector<GridTrackSize>& lengths) { SET_VAR(rareNonInheritedData.access()->m_grid, m_gridDefinitionRows, lengths); }
     void setNamedGridColumnLines(const NamedGridLinesMap& namedGridColumnLines) { SET_VAR(rareNonInheritedData.access()->m_grid, m_namedGridColumnLines, namedGridColumnLines); }
     void setNamedGridRowLines(const NamedGridLinesMap& namedGridRowLines) { SET_VAR(rareNonInheritedData.access()->m_grid, m_namedGridRowLines, namedGridRowLines); }
+    void setNamedGridArea(const NamedGridAreaMap& namedGridArea) { SET_VAR(rareNonInheritedData.access()->m_grid, m_namedGridArea, namedGridArea); }
+    void setNamedGridAreaRowCount(size_t rowCount) { SET_VAR(rareNonInheritedData.access()->m_grid, m_namedGridAreaRowCount, rowCount); }
+    void setNamedGridAreaColumnCount(size_t columnCount) { SET_VAR(rareNonInheritedData.access()->m_grid, m_namedGridAreaColumnCount, columnCount); }
     void setGridAutoFlow(GridAutoFlow flow) { SET_VAR(rareNonInheritedData.access()->m_grid, m_gridAutoFlow, flow); }
 
     void setGridColumnStart(const GridPosition& columnStartPosition) { SET_VAR(rareNonInheritedData.access()->m_gridItem, m_gridColumnStart, columnStartPosition); }
@@ -1595,6 +1601,9 @@ public:
     static NamedGridLinesMap initialNamedGridColumnLines() { return NamedGridLinesMap(); }
     static NamedGridLinesMap initialNamedGridRowLines() { return NamedGridLinesMap(); }
 
+    static NamedGridAreaMap initialNamedGridArea() { return NamedGridAreaMap(); }
+    static size_t initialNamedGridAreaCount() { return 0; }
+
     // 'auto' is the default.
     static GridPosition initialGridColumnStart() { return GridPosition(); }
     static GridPosition initialGridColumnEnd() { return GridPosition(); }