Make inSameLine() in VisibleUnits.cpp to work with positions in composed tree

Source/core/editing/VisibleUnits.cpp

Index: Source/core/editing/VisibleUnits.cpp
diff --git a/Source/core/editing/VisibleUnits.cpp b/Source/core/editing/VisibleUnits.cpp
index 1727f35c65de8f2bf2a0a442fe517ffe7017c58c..8470d00d263cd815ffa4698138afff0046772d77 100644
--- a/Source/core/editing/VisibleUnits.cpp
+++ b/Source/core/editing/VisibleUnits.cpp
@@ -778,6 +778,11 @@ static PositionWithAffinity startOfLine(const PositionWithAffinity& currentPosit
     return startOfLine(currentPosition, UseInlineBoxOrdering);
 }
 
+static PositionInComposedTreeWithAffinity startOfLine(const PositionInComposedTreeWithAffinity& currentPosition)
+{
+    return startOfLine(currentPosition, UseInlineBoxOrdering);
+}
+
 // FIXME: Rename this function to reflect the fact it ignores bidi levels.
 VisiblePosition startOfLine(const VisiblePosition& currentPosition)
 {
@@ -900,8 +905,8 @@ bool inSameLineAlgorithm(const PositionWithAffinityType& position1, const Positi
 {
     if (position1.isNull() || position2.isNull())
         return false;
-    PositionWithAffinity startOfLine1 = startOfLine(position1);
-    PositionWithAffinity startOfLine2 = startOfLine(position2);
+    PositionWithAffinityType startOfLine1 = startOfLine(position1);
+    PositionWithAffinityType startOfLine2 = startOfLine(position2);
     if (startOfLine1 == startOfLine2)
         return true;
     typename PositionWithAffinityType::PositionType canonicalized1 = canonicalPositionOf(startOfLine1.position());
@@ -915,6 +920,11 @@ bool inSameLine(const PositionWithAffinity& a, const PositionWithAffinity& b)
     return inSameLineAlgorithm(a, b);
 }
 
+bool inSameLine(const PositionInComposedTreeWithAffinity& position1, const PositionInComposedTreeWithAffinity& position2)
+{
+    return inSameLineAlgorithm(position1, position2);
+}
+
 bool inSameLine(const VisiblePosition &a, const VisiblePosition &b)
 {
     return inSameLine(PositionWithAffinity(a.deepEquivalent(), a.affinity()), PositionWithAffinity(b.deepEquivalent(), b.affinity()));