Refactor DocumentMarkerController

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

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
index b18b3fd88304206850783d3ee5de7a20483edd5f..9e145ba375e17d9e51394ba5f70928367612babd 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
@@ -30,6 +30,7 @@
 
 #include "core/editing/markers/DocumentMarker.h"
 
+#include "core/editing/markers/RenderedTextMatchMarker.h"
 #include "wtf/StdLibExtras.h"
 
 namespace blink {
@@ -171,6 +172,17 @@ void DocumentMarker::shiftOffsets(int delta) {
   m_endOffset += delta;
 }
 
+bool DocumentMarker::isRenderedTextMatch() const {
+  return false;
+}
+
+RenderedTextMatchMarker* DocumentMarker::asRenderedTextMatchMarker() {
+  if (!this->isRenderedTextMatch())
+    return nullptr;
+
+  return static_cast<RenderedTextMatchMarker*>(this);
+}
+
 void DocumentMarker::setActiveMatch(bool active) {
   m_details = DocumentMarkerTextMatch::create(active);
 }