Get rid of redundant parameter PositionIsOffsetInAnchor from PositionAlgorithm constructor

Source/core/editing/VisibleUnitsTest.cpp

Index: Source/core/editing/VisibleUnitsTest.cpp
diff --git a/Source/core/editing/VisibleUnitsTest.cpp b/Source/core/editing/VisibleUnitsTest.cpp
index e53f20a5f402f4ac42cf9cb83bca4216969248af..897dee3629bee75d6810537bdf3e309e2e2a9fe8 100644
--- a/Source/core/editing/VisibleUnitsTest.cpp
+++ b/Source/core/editing/VisibleUnitsTest.cpp
@@ -14,12 +14,12 @@ namespace {
 
 PositionWithAffinity positionWithAffinityInDOMTree(Node& anchor, int offset, EAffinity affinity = DOWNSTREAM)
 {
-    return PositionWithAffinity(canonicalPositionOf(Position(&anchor, offset, Position::PositionIsOffsetInAnchor)), affinity);
+    return PositionWithAffinity(canonicalPositionOf(Position(&anchor, offset)), affinity);
 }
 
 PositionInComposedTreeWithAffinity positionWithAffinityInComposedTree(Node& anchor, int offset, EAffinity affinity = DOWNSTREAM)
 {
-    return PositionInComposedTreeWithAffinity(canonicalPositionOf(PositionInComposedTree(&anchor, offset, PositionInComposedTree::PositionIsOffsetInAnchor)), affinity);
+    return PositionInComposedTreeWithAffinity(canonicalPositionOf(PositionInComposedTree(&anchor, offset)), affinity);
 }
 
 } // namespace