Add version of TextIterator constructor that takes EphemeralRange

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

Index: third_party/WebKit/Source/core/editing/iterators/TextIterator.cpp
diff --git a/third_party/WebKit/Source/core/editing/iterators/TextIterator.cpp b/third_party/WebKit/Source/core/editing/iterators/TextIterator.cpp
index 2368499c400e69dd5e1be50b64b2d69bc7656057..ec6d89e574b0380668d404f32c8bd21c4c732e86 100644
--- a/third_party/WebKit/Source/core/editing/iterators/TextIterator.cpp
+++ b/third_party/WebKit/Source/core/editing/iterators/TextIterator.cpp
@@ -182,6 +182,14 @@ TextIteratorAlgorithm<Strategy>::TextIteratorAlgorithm(
 }
 
 template <typename Strategy>
+TextIteratorAlgorithm<Strategy>::TextIteratorAlgorithm(
+    const EphemeralRangeTemplate<Strategy>& range,
+    const TextIteratorBehavior& behavior)
+    : TextIteratorAlgorithm(range.StartPosition(),
+                            range.EndPosition(),
+                            behavior) {}
+
+template <typename Strategy>
 void TextIteratorAlgorithm<Strategy>::Initialize(Node* start_container,
                                                  int start_offset,
                                                  Node* end_container,