Move SelectionState out of LayoutObject and into Line Layout API

Source/core/layout/LayoutBlockFlowLine.cpp

Index: Source/core/layout/LayoutBlockFlowLine.cpp
diff --git a/Source/core/layout/LayoutBlockFlowLine.cpp b/Source/core/layout/LayoutBlockFlowLine.cpp
index 1adb85f642620f242e08320e00f510ef835cdffd..29bd228b016eaf7b03641a15d9a372a10ab7b8d5 100644
--- a/Source/core/layout/LayoutBlockFlowLine.cpp
+++ b/Source/core/layout/LayoutBlockFlowLine.cpp
@@ -33,6 +33,7 @@
 #include "core/layout/TextRunConstructor.h"
 #include "core/layout/VerticalPositionCache.h"
 #include "core/layout/api/LineLayoutItem.h"
+#include "core/layout/api/SelectionState.h"
 #include "core/layout/line/BreakingContextInlineHeaders.h"
 #include "core/layout/line/GlyphOverflow.h"
 #include "core/layout/line/LayoutTextInfo.h"
@@ -220,7 +221,7 @@ RootInlineBox* LayoutBlockFlow::constructLine(BidiRunList<BidiRun>& bidiRuns, co
         if (!box)
             continue;
 
-        if (!rootHasSelectedChildren && box->layoutObject().selectionState() != LayoutObject::SelectionNone)
+        if (!rootHasSelectedChildren && box->layoutObject().selectionState() != SelectionNone)
             rootHasSelectedChildren = true;
 
         // If we have no parent box yet, or if the run is not simply a sibling,