[WIP] Move DocumentMarker accessors into subclasses

third_party/WebKit/Source/web/ContextMenuClientImpl.cpp

Index: third_party/WebKit/Source/web/ContextMenuClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ContextMenuClientImpl.cpp b/third_party/WebKit/Source/web/ContextMenuClientImpl.cpp
index 701d204c2be30d0c1996c3cd483314d17ca018c3..deeae9e58c735f8f63ee389a80e6d60f27fbd23c 100644
--- a/third_party/WebKit/Source/web/ContextMenuClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ContextMenuClientImpl.cpp
@@ -38,6 +38,7 @@
 #include "core/dom/Document.h"
 #include "core/editing/Editor.h"
 #include "core/editing/markers/DocumentMarkerController.h"
+#include "core/editing/markers/SpellCheckMarker.h"
 #include "core/editing/spellcheck/SpellChecker.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
@@ -119,7 +120,7 @@ static String selectMisspellingAsync(LocalFrame* selectedFrame,
           EphemeralRange(selectionRange), DocumentMarker::MisspellingMarkers());
   if (markers.size() != 1)
     return String();
-  description = markers[0]->description();
+  description = toSpellCheckMarker(markers[0])->description();
 
   // Cloning a range fails only for invalid ranges.
   Range* markerRange = selectionRange->cloneRange();