Add version of TextIterator constructor that takes EphemeralRange

third_party/WebKit/Source/core/editing/iterators/TextIterator.h

Index: third_party/WebKit/Source/core/editing/iterators/TextIterator.h
diff --git a/third_party/WebKit/Source/core/editing/iterators/TextIterator.h b/third_party/WebKit/Source/core/editing/iterators/TextIterator.h
index fd420e0ff9d07992c34fa24e46fa4dd5fc0cb12b..e3017778616507f6cd7917b4e90331d3f3e7a950 100644
--- a/third_party/WebKit/Source/core/editing/iterators/TextIterator.h
+++ b/third_party/WebKit/Source/core/editing/iterators/TextIterator.h
@@ -59,6 +59,12 @@ class CORE_TEMPLATE_CLASS_EXPORT TextIteratorAlgorithm {
   TextIteratorAlgorithm(const PositionTemplate<Strategy>& start,
                         const PositionTemplate<Strategy>& end,
                         const TextIteratorBehavior& = TextIteratorBehavior());
+
+  // Same behavior as previous constructor but takes an EphemeralRange instead
+  // of two Positions
+  TextIteratorAlgorithm(const EphemeralRangeTemplate<Strategy>&,
+                        const TextIteratorBehavior& = TextIteratorBehavior());
+
   ~TextIteratorAlgorithm();
 
   bool AtEnd() const { return !text_state_.PositionNode() || should_stop_; }