[Editing] Modify mostForward/BackwardCaretPosition naming confusion.

Source/core/editing/VisibleUnits.h

Index: Source/core/editing/VisibleUnits.h
diff --git a/Source/core/editing/VisibleUnits.h b/Source/core/editing/VisibleUnits.h
index 8f3bfddab701a45d83705b26fd7a64028cb13dc4..f8f1805a39d00949480c5bcfdab24829f03dab40 100644
--- a/Source/core/editing/VisibleUnits.h
+++ b/Source/core/editing/VisibleUnits.h
@@ -50,21 +50,21 @@ enum EWordSide { RightWordIfOnBoundary = false, LeftWordIfOnBoundary = true };
 // collapsible, there are two candidates that map to the VisiblePosition
 // between 'b' and the space, after first space and before last space.
 //
-// mostForwardCaretPosition returns the left candidate and also returs
+// mostBackwardCaretPosition returns the left candidate and also returs
 // [boundary, 0] for any of the positions from [boundary, 0] to the first
 // candidate in boundary, where
 // endsOfNodeAreVisuallyDistinctPositions(boundary) is true.
 //
-// mostBackwardCaretPosition() returns the right one and also returns the
+// mostForwardCaretPosition() returns the right one and also returns the
 // last position in the last atomic node in boundary for all of the positions
 // in boundary after the last candidate, where
 // endsOfNodeAreVisuallyDistinctPositions(boundary).
 // FIXME: This function should never be called when the line box tree is dirty.
 // See https://bugs.webkit.org/show_bug.cgi?id=97264
-CORE_EXPORT Position mostForwardCaretPosition(const Position &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
-CORE_EXPORT PositionInComposedTree mostForwardCaretPosition(const PositionInComposedTree &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
 CORE_EXPORT Position mostBackwardCaretPosition(const Position &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
 CORE_EXPORT PositionInComposedTree mostBackwardCaretPosition(const PositionInComposedTree &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
+CORE_EXPORT Position mostForwardCaretPosition(const Position &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
+CORE_EXPORT PositionInComposedTree mostForwardCaretPosition(const PositionInComposedTree &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
 
 // words
 CORE_EXPORT VisiblePosition startOfWord(const VisiblePosition &, EWordSide = RightWordIfOnBoundary);