[DMC #1.2] Add DocumentMarkerListEditor::MoveMarkers()

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

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
index 8d2c9b5f29f1ed274dd98c526805ea01614bd503..8214cc23da5d3f2d1135708b8da89cc4776c30be 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
@@ -59,6 +59,11 @@ class DocumentMarkerListEditor {
 
   static void AddMarker(MarkerList*, const DocumentMarker*);
 
+  // Returns true if a marker was moved, false otherwise.
+  static bool MoveMarkers(MarkerList* src_list,
+                          int length,
+                          MarkerList* dst_list);
+
   // Returns true if a marker was removed, false otherwise.
   static bool RemoveMarkers(MarkerList*, unsigned start_offset, int length);