Get rid of redundant parameter PositionIsOffsetInAnchor from PositionAlgorithm constructor

Source/core/editing/iterators/TextIteratorTest.cpp

Index: Source/core/editing/iterators/TextIteratorTest.cpp
diff --git a/Source/core/editing/iterators/TextIteratorTest.cpp b/Source/core/editing/iterators/TextIteratorTest.cpp
index 797ba51509ae3a32e9eb46f2b5ca8ba398b5d10c..8ea50e89a073c7f4d2ec24748c5df5714e6b0bba 100644
--- a/Source/core/editing/iterators/TextIteratorTest.cpp
+++ b/Source/core/editing/iterators/TextIteratorTest.cpp
@@ -66,8 +66,8 @@ std::string TextIteratorTest::iterate(TextIteratorBehavior iteratorBehavior)
 {
     RefPtrWillBeRawPtr<Element> body = document().body();
     using PositionType = typename Tree::PositionType;
-    auto start = PositionType(body, 0, PositionType::PositionIsOffsetInAnchor);
-    auto end = PositionType(body, Tree::countChildren(*body), PositionType::PositionIsOffsetInAnchor);
+    auto start = PositionType(body, 0);
+    auto end = PositionType(body, Tree::countChildren(*body));
     typename Tree::TextIteratorType iterator(start, end, iteratorBehavior);
     return iterateWithIterator<Tree>(iterator);
 }