[DMC #2] Add DocumentMarkerList interface and GenericDocumentMarkerListImpl

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

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarkerListEditor.h
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerListEditor.h b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerListEditor.h
index f41907cee207badda861c235886f4f8515d25bcf..71dae9ed4cba7b8a33c9842eb5c3230925f6a426 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerListEditor.h
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerListEditor.h
@@ -5,6 +5,7 @@
 #ifndef DocumentMarkerListEditor_h
 #define DocumentMarkerListEditor_h
 
+#include "core/editing/markers/DocumentMarkerList.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
@@ -21,7 +22,7 @@ class DocumentMarkerListEditor {
   // Returns true if a marker was moved, false otherwise.
   static bool MoveMarkers(MarkerList* src_list,
                           int length,
-                          MarkerList* dst_list);
+                          DocumentMarkerList* dst_list);
 
   // Returns true if a marker was removed, false otherwise.
   static bool RemoveMarkers(MarkerList*, unsigned start_offset, int length);