Implement 'grid-template' parsing

Source/core/rendering/style/GridCoordinate.h

Index: Source/core/rendering/style/GridCoordinate.h
diff --git a/Source/core/rendering/style/GridCoordinate.h b/Source/core/rendering/style/GridCoordinate.h
index a55b7fb79ae705980ce250cfbf3fcb6578c36670..ec0d890a43bafffc23d2e0e630d1228960b9f8b8 100644
--- a/Source/core/rendering/style/GridCoordinate.h
+++ b/Source/core/rendering/style/GridCoordinate.h
@@ -31,7 +31,9 @@
 #ifndef GridCoordinate_h
 #define GridCoordinate_h
 
+#include "wtf/HashMap.h"
 #include "wtf/PassOwnPtr.h"
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
@@ -51,6 +53,11 @@ struct GridSpan {
         ASSERT(initialPositionIndex <= finalPositionIndex);
     }
 
+    bool operator==(const GridSpan& o) const
+    {
+        return initialPositionIndex == o.initialPositionIndex && finalPositionIndex == o.finalPositionIndex;
+    }
+
     size_t initialPositionIndex;
     size_t finalPositionIndex;
 };
@@ -70,10 +77,22 @@ struct GridCoordinate {
     {
     }
 
+    bool operator==(const GridCoordinate& o) const
+    {
+        return columns == o.columns && rows == o.rows;
+    }
+
+    bool operator!=(const GridCoordinate& o) const
+    {
+        return !(*this == o);
+    }
+
     GridSpan columns;
     GridSpan rows;
 };
 
+typedef HashMap<String, GridCoordinate> NamedGridAreaMap;
+
 } // namespace WebCore
 
 #endif // GridCoordinate_h