Refactor DocumentMarkerController

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

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
index 7db49d1a45320fa4724c6a664cb6a6d88e08a618..82fc3aa6b3280929309c919910e3ed57247ee66c 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
@@ -32,6 +32,7 @@
 namespace blink {
 
 class DocumentMarkerDetails;
+class RenderedTextMatchMarker;
 
 // A range of a node within a document that is "marked", such as the range of a
 // misspelled word. It optionally includes a description that could be displayed
@@ -118,12 +119,17 @@ class CORE_EXPORT DocumentMarker : public GarbageCollected<DocumentMarker> {
   void setActiveMatch(bool);
   void clearDetails() { m_details.clear(); }
 
-  // Offset modifications are done by DocumentMarkerController.
-  // Other classes should not call following setters.
+  // Offset modifications are done by DocumentMarkerController and the classes
+  // that implement the marker lists. Other classes should not call following
+  // setters.
   void setStartOffset(unsigned offset) { m_startOffset = offset; }
   void setEndOffset(unsigned offset) { m_endOffset = offset; }
   void shiftOffsets(int delta);
 
+  virtual bool isRenderedTextMatch() const;
+
+  RenderedTextMatchMarker* asRenderedTextMatchMarker();

[Xiaocheng, 2017/03/01 22:24:48]

Please use the DEFINE_TYPE_CASTS macro to define type casts.

Example:
https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/editing/c...

+
   bool operator==(const DocumentMarker& o) const {
     return type() == o.type() && startOffset() == o.startOffset() &&
            endOffset() == o.endOffset();