[DMC #25] Make DocumentMarker::GetType() virtual

third_party/WebKit/Source/core/editing/markers/SpellCheckMarker.cpp

Index: third_party/WebKit/Source/core/editing/markers/SpellCheckMarker.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/SpellCheckMarker.cpp b/third_party/WebKit/Source/core/editing/markers/SpellCheckMarker.cpp
index bafcf71943070010974207a17decf4e60ecf8c42..2881251a6c844665d0f61665bff9d4fea056bc0b 100644
--- a/third_party/WebKit/Source/core/editing/markers/SpellCheckMarker.cpp
+++ b/third_party/WebKit/Source/core/editing/markers/SpellCheckMarker.cpp
@@ -6,12 +6,10 @@
 
 namespace blink {
 
-SpellCheckMarker::SpellCheckMarker(DocumentMarker::MarkerType type,
-                                   unsigned start_offset,
+SpellCheckMarker::SpellCheckMarker(unsigned start_offset,
                                    unsigned end_offset,
                                    const String& description)
-    : DocumentMarker(type, start_offset, end_offset),
-      description_(description) {}
+    : DocumentMarker(start_offset, end_offset), description_(description) {}
 
 const String& SpellCheckMarker::Description() const {
   return description_;