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..4c8a32463688898f4c4ff4c683d647a879371295 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
@@ -118,12 +118,25 @@ 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.
+  struct ShiftMarkerResult {
+    unsigned newStartOffset;
+    unsigned newEndOffset;
+    bool shouldRemoveMarker;
+  };
+
+  ShiftMarkerResult getShiftedMarkerPosition(unsigned offset,

[Xiaocheng, 2017/03/21 19:12:11]

nit: add |const|

+                                             unsigned oldLength,
+                                             unsigned newLength);
+
+  // 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;
+
   bool operator==(const DocumentMarker& o) const {
     return type() == o.type() && startOffset() == o.startOffset() &&
            endOffset() == o.endOffset();