Comment/test for DocumentMarkerList::MarkersIntersectingRange() with collapsed range

third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h
index b5890004ec5fcf3f2ba745189e4b9f942bd179fc..712da9993776af6b8d8fb862ccc09abac7880a29 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h
@@ -33,8 +33,9 @@ class CORE_EXPORT DocumentMarkerList
 
   // Returns all markers
   virtual const HeapVector<Member<DocumentMarker>>& GetMarkers() const = 0;
-  // Returns markers that have non-empty overlap with the range
-  // [start_offset, end_offset]
+  // Return markers whose interiors have non-empty overlap with the range

[Xiaocheng, 2017/06/23 21:40:32]

nit: s/Return/Returns/

Sorry for my typo.

+  // [start_offset, end_offset]. Note that the range can be collapsed, in which
+  // case markers containing the offset in their interiors are returned.
   virtual HeapVector<Member<DocumentMarker>> MarkersIntersectingRange(
       unsigned start_offset,
       unsigned end_offset) const = 0;