Introduce absoluteCaretBoundsOf() for VisiblePosition

Source/core/editing/commands/DeleteSelectionCommand.cpp

Index: Source/core/editing/commands/DeleteSelectionCommand.cpp
diff --git a/Source/core/editing/commands/DeleteSelectionCommand.cpp b/Source/core/editing/commands/DeleteSelectionCommand.cpp
index da6c8f2c2e8b9beefe6cf472850eff16c8dc3787..bbad8d433d2111ea1317251eaa7d439700016f40 100644
--- a/Source/core/editing/commands/DeleteSelectionCommand.cpp
+++ b/Source/core/editing/commands/DeleteSelectionCommand.cpp
@@ -653,7 +653,7 @@ void DeleteSelectionCommand::mergeParagraphs()
 
     // The rule for merging into an empty block is: only do so if its farther to the right.
     // FIXME: Consider RTL.
-    if (!m_startsAtEmptyLine && isStartOfParagraph(mergeDestination) && startOfParagraphToMove.absoluteCaretBounds().x() > mergeDestination.absoluteCaretBounds().x()) {
+    if (!m_startsAtEmptyLine && isStartOfParagraph(mergeDestination) && absoluteCaretBoundsOf(startOfParagraphToMove).x() > absoluteCaretBoundsOf(mergeDestination).x()) {
         if (isHTMLBRElement(*mostForwardCaretPosition(mergeDestination.deepEquivalent()).anchorNode())) {
             removeNodeAndPruneAncestors(mostForwardCaretPosition(mergeDestination.deepEquivalent()).anchorNode());
             m_endingPosition = startOfParagraphToMove.deepEquivalent();